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Revision of Storthyngura Vanhöffen, 1914 (Crustacea: Isopoda: Munnopsididae) with descriptions of three new genera and four new species from the deep South Atlantic

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  • National Scientific Center of Marine Biology

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AbstractThe deep-sea genusStorthyngura (family Munnopsididae) is revised. Three new genera (Rectisura, Sursumura and Vanhoeffenella) and four new species (Rectisura richardsoniae, Sursumura aberrata, Vanhoeffenella georgei, and V. moskalevi) are described from deep-sea basins and trenches of the South Atlantic Ocean. Thirty-three previously described species are placed in new combinations with one of the new genera. Diagnoses are presented for the subfamily Storthyngurinae Kussakin (2003), the genus Storthyngura VanhÏffen, and all new taxa. The accompanying Electronic Supplement offers a key to the six genera in the subfamily, and keys to species inStorthyngura and the three new genera.
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Org. Divers. Evol. 3, Electr. Suppl. 13: 1 - 101 (2003)
© Gesellschaft für Biologische Systematik
http://senckenberg.de/odes/03-13.htm
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
Revision of Storthyngura Vanhöffen, 1914 (Crustacea: Isopoda: Munnopsidi-
dae) with descriptions of three new genera and four new species from the
deep South Atlantic
Marina V. Malyutina
Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 17 Palchevsky St, Vladivostok
690041, Russia
e-mail: inmarbio@mail.primorye.ru
Received 25 June 2002 Accepted 21 April 2003
Abstract
The deep-sea genus Storthyngura (family Munnopsididae) is revised. Three new genera (Rectisura, Sursumura
and Vanhoeffenella) and four new species (Rectisura richardsoni, Sursumura aberrata, Vanhoeffenella georgei,
and V. moskalevi) are described from deep-sea basins and trenches of the South Atlantic Ocean. Thirty-three
previously described species are placed in new combinations with one of the new genera. Diagnoses are pre-
sented for the subfamily Storthyngurinae Kussakin (2003), the genus Storthyngura Vanhöffen, and all new taxa. A
key to the six genera in the subfamily is offered, as well as keys to species in Storthyngura and the three new
genera.
Key words: deep sea, South Atlantic, Crustacea, Asellota, Munnopsididae, new taxa
Introduction
The munnopsidid genus Storthyngura was erected
by Vanhöffen (1914) for a group of 7 species
previously placed in Eurycope and the newly
proposed S. elegans. Wolff (1962) has presented a
key to the species of Storthyngura based on a
detailed study of 17 of the 28 species known at that
time, including 5 described as new in that work.
George & Menzies (1968a) have given a summary
of the history of the genus and added the
descriptions of 6 new species. In a subsequent paper
(George & Menzies 1968b) they listed 38 species of
Storthyngura with data for their distribution. Since
then, ten more species or subspecies have been
described: S. zenkevichi Birstein, 1969; S. paradoxa
and S. tenuispinis distincta Birstein, 1970; S.
octospinosalis and S. unicornalis Menzies &
George, 1972; S. magnifica Chardy, 1976; S.
myriamae George & Hinton, 1982; S. torbeni
George, 1987; S. parka Malyutina & Wägele, 2001;
and S. kussakini Brandt & Malyutina, 2002. Wilson
& al. (1989) revised the genus Microprotus,
demonstrated its close relationship to Storthyngura,
and transferred S. paradoxa to Microprotus. They
noted that these two genera form a monophyletic
taxon within the Munnopsididae Sars, 1869, and
stated that formal recognition of this group as a
subfamily had to wait until the genus Storthyngura
was revised. Malyutina (1999a) erected the new
genus Storthyngurella for 3 new species and 5
previously placed in Storthyngura: S. benti Wolff,
1956; S. digitata Menzies, 1962; S. spinosa
(Beddard, 1885); S. triplispinosa Menzies, 1962; and
S. zenkevichi. Kussakin (2003) placed Microprotus,
Storthyngura, and Storthyngurella in the new
subfamily Storthyngurinae.
In spite of the exclusion of some derived species
Storthyngura still is one of the most abundant and
diverse deep-sea genera in the family Munnopsidi-
dae. Until the present work, it included more than 40
species distributed over all world oceans except the
central part of the North Polar Sea and the Nordic
Seas: Norwegian, Greenland Seas. Lists of
Storthyngura species and data on their distribution
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
2
were presented in George & Menzies (1968b), and
Brandt & Malyutina (2002).
The genus Storthyngura contains munnopsidids
with spine-like projections on the body and various
pleotelson shapes. Storthyngura species are mainly
characterized by a strong, vaulted, muscular body up
to 5 cm long, although some species are minute,
fragile creatures only a few mm long (Fig. 1).
Different variations of functionally dependent
morphological features can be observed in
Storthyngura. For example, in species whose carpi
and propodi of pereopods 5-7 are broad, paddle-like,
with long marginal plumose setae, pereopods 3 and
4 are much longer than the other legs, and the body
is relatively streamlined. Probably, these Storthyn-
gura are able to walk on soft bottoms using the long
legs like stilts, and to swim short distances
backwards by means of their paddle-like posterior
legs. Fittingly, their pleotelson is usually apically
pointed and all body spines are directed forwards,
increasing the body's dynamic properties. Some
Storthyngura species have only very short spines
and a rounded pleotelson, resembling spineless
Eurycope with a similar correlation of leg sizes and
shape. In other species, narrowing of the legs in the
posterior pairs is accompanied by a decrease of
length differences between the legs, the latter all
having similar ambulatory functions. The body is
either flattened or all body projections protrude
outwards or backwards, and additional setae or
cuticular sculptures appear on the surface of the
body and on projections. These forms are better
adapted for a crawling, creeping life-style.
The pattern of body spines distinguishes species
of Storthyngura from some similar species of the
genera Eurycope and Munneurycope. Perhaps, the
ease with which species of Storthyngura can be
identified only on the basis of these superficial
features can explain why most of the existing
species descriptions are too brief and poorly
illustrated. Often only a dorsal view of the body and
a few details are shown. This circumstance did not
facilitate the revision of this large and heterogeneous
group. Except for body spines, almost all the 56
characters of Storthyngura mentioned by George &
Menzies (1968a) are also common in species of
Eurycope and cannot be use to distinguish species
groups. George & Menzies (1968b), referring to 156
characters, divided the genus into five groups and 14
subgroups mainly on the basis of pleotelson
morphology. However, their subgroups separated
species, for example, with truncated or with forked
pleotelson tips, and united species with different
antennal structure. The inadequacy of this
classification has been pointed out by several
researchers (Birstein 1969, 1970; Wilson & al. 1989,
Malyutina 1999b).
For the present revision many specimens of
Storthyngura from the South Atlantic, collected by
several Russian expeditions of RV Akademik
Kurchatov and RV Dmitry Mendeleev, have been
investigated. Moreover, two specimens of
Storthyngura were identified from the material of
the German DIVA expedition (cruise M 48/1 of RV
Meteor 2000). Some other species were also studied
for differential diagnoses, including the type species,
S. elegans (see Malyutina & Wägele 2001). A
detailed character analysis revealed that the genus
Storthyngura can be split into four genera. Important
distinctive characters that have to be described are
the following: the structure of peduncular articles of
antenna 1, the dorsum of the head (Fig. 3), the
anterolateral corners of pereonite 3, the posterior
part of the pleotelson (Fig. 1), the morphology of
pereopods (especially the carpi and propodi of the
last three pairs), and the pleopods (Figs 4, 5).
Among these characters, the most important for easy
identification of the genus is the structure of the
peduncular articles of antenna 1.
During the revision, four new species were
identified. Illustrated descriptions of them are
presented below, along with diagnoses and
descriptions of the three new genera, and keys for
the identification of the four genera and their
species.
Terminology and measurements follow Wilson &
Hessler (1980) and Wilson (1989). The type material
is deposited in the Zoological Museum of Moscow
University (ZMMU), Moscow, Russia.
Abbreviations used in the text and figures: R =
rostrum; A 1, A 2 = antenna 1 and 2; Md =
mandible; MdP = mandibular palp; Mx 1, 2 =
maxilla 1 and 2; Mxp = maxilliped; P 1-7 =
pereopods 1-7; Pl 1-5 = pleopods 1-5; Urp = uropod.
Taxonomy
Suborder Asellota
Family Munnopsididae Sars, 1869
Subfamily Storthyngurinae Kussakin, 2003
Storthyngurinae Kussakin, 2003: 273.
Diagnosis. Body with dorsal and lateral spine-like
projections. Pereopod 1 with 1 and pereopods 2-4
with 2 coxal projections visible from above.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
3
Antenna 1 basal article elongate, with distolateral
lobe. Squama on article 3 of antenna 2 not
articulated. Mandible with proximolateral projection
for articulation with head in elongate slot. Male
pleopod 1 elongate, often narrowing in the middle
part. Female pleopod 2 medial keel low. Uropod
elongate, tubular protopod and rami subequal in
length.
Description (Figs 1-5). Body elongate, ambulosoma
(pereonites 1-4) and natasoma (pereonites 5-7 and
pleotelson) subequal in width. Head wider than long,
without rostrum. Pereonites 1-4 short and broad,
movably articulated, pereonite 1 smallest. Pereonites
5-7 convex, fused to each other and with pleon,
often with dorsal sutures, anterolateral corners
projecting. Pleotelson with 2 or 3 pairs of lateral
projections.
Clypeus significantly broader than labrum.
Antenna 1 basal article ventral side longitudinally
concave, article 2 much smaller, inserted on dorsal
side of article 1, somewhat behind its frontal margin,
articles 3 and 5 elongate, article 4 shortest among
first five, in males articles 2–5 broader and stronger
than in females; flagellar articles in male short,
numerous, in female flagellar articles longer, less
numerous. Antenna 2 article 1 triangular, about half
as wide as article 2, article 3 with triangular distal
projections, proximolateral keel, and low rounded
bump dorsally. Mandibular molar process truncated
distally, posterior margin of triturative surface with
row of denticles and setulose setae, ventral tooth
present; palp well developed, subequal in length to
mandibular body, terminal article broad, twisted.
Maxilla 1 inner endite bent medially, distomedial
seta largest among numerous distal setae.
Maxillipedal palp inserting in midlength of basis,
articles 2 and 3 subequal in width to basis, epipod
elongate. All pereopod bases subequal in length.
Pereopod 1 shortest, carpus slightly curved, bearing
only simple setae. Pereopods 2–4 carpi and propodi
straight, bearing strong, unequal bifid ventral setae
and sparse simple dorsal setae. Pereopods 5-7 of
similar shape and size, subequal in length to
pereopod 2, with carpus and propodus only
moderately expanded; dactyli of pereopods 2–7 with
acute dorsal claw provided with inner acute
projection. Male pleopod 2 protopod semicircular,
lateral and distal margins with plumose setae, female
operculum with or without ventral spine, margins
with plumose setae. Pleopod 3 exopod conspiqu-
ously narrower than endopod, 2-segmented, with
numerous distal plumose setae.
Included genera: Storthyngura, Microprotus,
Storthyngurella, Vanhoeffenella gen. n., Rectisura
gen. n., and Sursumura gen. n.
Remarks. The members of Storthyngurinae differ
from those of Acanthocopinae Wolff, 1962 (Fig. 2a)
in possessing the usual munnopsidid shapes of male
pleopods 1 and 2 (pleopods of Acanthocope as in
Fig. 2), uropods with subequal rami (exopod is
reduced or very short in Acanthocope), the well
developed, 3-articulated mandibular palp (palp of
Acanthocope is reduced or small, with straight last
article), and pereopods 5-7 dactylus with stout dorsal
claw (absent in Acanthocope).
Storthyngurinae differ from Eurycopinae Hansen,
1916 (Fig. 2b) in having body spines (absent in
Eurycopinae), squama on article 3 of antenna 2 not
separated, in the absence of a head rostrum and a
medial lobe of antenna 1 article 1 (the lobe
prominent in Eurycopinae), and in the presence of
the narrow slot for the mandibular articulation with
the head.
Key to the genera of Storthyngurinae
(Figs 1, 3-5)
1 Pereonite 4 anterolateral corners rounded, pereo-
nites 5-7 with 3 dorsal spines each, pleotelson
visibly broader than long .....................................
..................... Microprotus Richardson, 1910 (see
diagnosis in Wilson et al. 1989)
Pereonite 4 anterolateral corners acute,
projecting, pereonites 5-7 with not more than 2
dorsal spines each, pleotelson not broader than
long .................................................................... 2
2 Antenna 1 article 1 with distolateral lobe
subrectangular, truncated distally; article 2 longer
than the lobe, with proximolateral process. Head
frontal margin with shallow rectangular notches
for antenna 1 insertion, a pair of anterodorsal
tubercles behind these notches ..............................
......................................... Vanhoeffenella gen. n.
Antenna 1 article 1 with rounded or triangular
distolateral lobe, article 2 without proximolateral
process, antennal sockets more or less rounded... 3
3 Antenna 1 article 1 without medial spine,
distolateral lobe faintly pronounced, article 2
subequal to or longer than the lobe of article 1,
with distomedial process, antenna 2 article 1
without lateral projection, head dorsally dome-
shaped, without dorsal spines. Pleotelson tip
truncated or forked .................... Rectisura gen. n.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
4
Antenna 1 article 1 with medial spine near
insertion of article 2 ............................................ 4
4 Head without dorsal spines (pair of tubercles in
S. vemae and S. magnispinis). Pleotelson not
pointed posteriorly ................................................
............................ Storthyngura Vanhöffen, 1914
Head with dorsal spines. Pleotelson pointed
posteriorly .............………..…………………5
5 Body strong, of large size (10-50 mm long), with
rather short spines. Pereopods 2-4 anterior coxal
projection conspicuously longer than posterior,
male pleopod 1 distal tip narrow, not extending
far beyond distal margin of pleopod 2. Antenna 1
article 2 markedly shorter than distolateral lobe
of article 1 .............................. Sursumura gen. n.
Body fragile, of small size (6-16 mm long), with
very long spines. Both coxal spines of pereopods
2-4 long, subequal in length, male pleopod 1
distal part diverging laterally, extending far
beyond distal margin of pleopod 2. Antenna 1
article 2 longer than distolateral lobe of article 1...
......................... Storthyngurella Malyutina, 1999
Vanhoeffenella gen. n.
Diagnosis. Frontal margin of head with shallow,
roughly rectangular notches for antenna 1 insertion,
a pair of dorsal anterior tubercles behind these
notches. Anterolateral corners of pereonite 3 with
acute projections, shorter than coxae. Pleotelson
terminal process bent downwards. Body with
ventromedial keel of rather long spines. Antenna 1
article 1 without medial spine, distolateral lobe
subrectangular, truncated distally; article 2 longer
than the lobe, with proximolateral process.
Mandibular palp sturdy. Medial margin of
maxillipedal palp article 2 straight, shorter than that
of article 3. Pereopods 3 and 4 considerably longer
than pereopod 2; pereopods 5-7 carpi and propodi
broad, oval, propodi longer than carpi. Pleopod 2
stylet nearly half of protopod length. Pleopod 3
endopod with numerous distomedial plumose setae,
exopod basal article broader than distal article.
Pleopod 4 exopod with many plumose setae distally.
Description. Body strong, of large size (10-35 mm
long), widest at pereonite 5. Head with oblique
furrows behind pair of dorsal tubercles, outlined
triangular medial area, usually subdivided by
transverse, somewhat convex seam; frontal margin
slightly ridged, laterally projecting cheeks at
mandibular articulation not visible in dorsal view,
ventral area around articulating slot moderately
swollen; frons short, steep, frontal arch narrow, high,
triangular in frontal view, with stout lateral bulges,
clypeus thick, long in dorsal and short in frontal
view. Pereonite 1 slightly broader than head.
Pereonites 1–4 subdivided into 2 parts by transverse
groove. Coxae of pereopods 2-4 with proximal
longitudinal keel near lateral border of pereonite.
Natasoma somewhat longer than anterior body part
(head and ambulosoma). Dorsal sutures between
pereonites 5-7 well defined, pereonite 6 jutting into
pereonite 5 medially by narrow rounded projection,
anterior margin of pereonite 5 with small
projections, opposite to posterolateral corners of
pereonite 4. Pleonite weakly demarcated from
pereonite 7 by shallow groove and by suture from
pleotelson. Pleotelson subtriangular, tapering,
somewhat longer than broad, dorsally divided into
central and two lateral convex lobes, anterolateral
corners projecting forwards or perpendicular to body
axis, posterolateral projections situating on posterior
one-third of pleotelson, short transverse dorsal pore
at the base of terminal process, ventral preanal ridge
well produced.
Antenna 1 basal article with subparallel margins,
central part thick, swollen dorsally, without medial
spine, with low transverse keel beneath the insertion
of article 2; article 2 narrow in proximal part with
following conspicuous proximolateral process.
Article 1 of antenna 2 without spines, articles 1 and
2 fused dorsally, suture between them present only
laterally and ventrally.
Mandibular incisor process narrow in dorsal and
ventral view, with 4 cusps, lacinia mobilis of left
mandible subequal to incisor process in length,
molar process broadened distally. Maxilla 2 middle
and outer endites with 4 spine-like distal setae: two
of them long, with short setulae along, two other
short, comb-like, with long spinules along; inner
lobe with strong, comb-like distal setae. Maxilliped
basis convex ventrally, with proximomedial boss,
epipod with oblique groove from proximomedial
corner to distolateral margin, lateral margin concave,
forming acute curved process.
Pereopods 5-7 carpus and propodus about twice
as long as wide, ventral margins convex. Pereopod 5
with shortest and broadest basis and largest carpus
and propodus, pereopod 7 with opposite proportions.
Male pleopod 1 slightly narrowing at midlength.
Male pleopod 2 protopod with acute projection
distomedially, extrinsic musculature occupying
longitudinal central part of protopod, its ventral
surface convex, endopod inserted in distal third of
protopod, exopod with long distal hook. Uropod less
than half as long as pleotelson.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
5
Etymology. The genus is named after E. Vanhöffen,
the author of the genus Storthyngura.
Species included. See the following key. Except for
the two new ones all species are transferred from
Storthyngura.
Type species. Vanhoeffenella pulchra (Hansen,
1897) comb. n., by present designation.
Distribution. Pacific ocean: northwestern Trenches,
depth 3429-8430 m, southwestern Trenches, depth
2012-6720 m, eastern Pacific, depth 2487-4423 m;
Atlantic ocean: Caribbean region, depth 1260-8045
m, southern region, depth 1737-6670 m; southern
Indian ocean, depth 2300-2925 m.
Key to species of Vanhoeffenella gen. n.
1 Pleotelson without well pronounced
posterolateral and terminal spines, instead there
are angular short processes ................................ 2
Pleotelson with well pronounced posterolateral
and terminal spines ............................................ 6
2 Dorsal pairs of spines and lateral spines of
pereonites 5-7 weakly protruding ...................... 3
Dorsal pairs of spines and lateral spines of
pereonites 5-7 well protruding ........................... 5
3 Distance between dorsal spines on pereonite 5
longer than spines .................................................
....... V. novaezelandiae (Beddard, 1885) comb. n.
Dorsal spines of pereonite 5 situated very close
to each other ....................................................... 4
4 Pleotelson rounded posteriorly. Interantennular
distance very short ..................... V. georgei sp. n.
Pleotelson pointed posteriorly. Interantennular
distance about half of antenna 1 basal article
width ............ V. torbeni (George, 1987) comb. n.
5 Pleotelson lateral margin with small, subacute
process posteriorly. Head with small medial
spine. Lateral spines of pereonite 5 as long as
pereonite 5. Preanal process pointed .....................
.. V. eltaniae (George & Menzies, 1968) comb. n.
Pleotelson lateral margin with minute triangular
process on anterior third and two acute
projections with insertion inbetween on posterior
third; lateral spines of pereonite 5 as long as half
of pereonite 5 width. Preanal process with deep
notch ...................................... V. moskalevi sp. n.
6 Pereonites 5-7 with pair of low longitudinal keels
pointed anteriorly ............................................... 7
Pereonites 5-7 with pair of long spines at
midlength ......................................................... 12
7 Head with medial spine near posterior margin .. 8
Head without medial spine ................................. 9
8 Pleotelson posterolateral spines directed
backwards, margin between posterolateral spines
and terminal spine concave ...................................
.................... V. pulchra (Hansen, 1897) comb. n.
Pleotelson posterolateral spines directed
forwards, margin between posterolateral and
terminal spines straight .........................................
V. unicornalis (Menzies & George, 1972) comb. n.
9 Dorsal keels on pereonite 5 meeting anteriorly .....
. V. myriamae (George & Hinton, 1982) comb. n.
Dorsal keels on pereonites 5-7 parallel ............ 10
10 Pereonite 2 anterolateral corners with minute
acute projection .....................................................
................. V. caribbea (Benedict, 1901) comb. n.
Pereonite 2 anterolateral corners rounded in
dorsal view ....................................................... 11
11 Dorsal body spines rather long. Lateral
projection of pereonites 5-7 narrow, pereonite 1
without dorsomedial projection ............................
............ V. kermadecensis (Wolff, 1962) comb. n.
Dorsal body spines short. Lateral projection of
pereonites 5-7 broad, pereonite 1 with
dorsomedial projection ..........................................
............. V. symmetrica (Menzies, 1962) comb. n.
12 Pereonite 1 without medial spine ..................... 13
Pereonite 1 with medial spine .......................... 16
13 Pleotelson terminal margin with a pointed
process ............................................................. 14
Pleotelson terminal margin rounded .....................
..... V. scotia (George & Menzies, 1968) comb. n.
14 Pleotelson posterolateral spines proximally
broad, directed backwards. Antenna 1 article 1
with small spine-like seta near insertion of article
2 ................. V. gordonae (Wolff, 1962) comb. n.
Pleotelson posterolateral spines narrow. Antenna
1 article 1 without small spine-like seta near
insertion of article 2 ......................................... 15
15 Pleotelson posterolateral spines very slender and
strongly curved forwards, propodi of pereopods 1
and 5 relatively long, pleotelson terminal spine
almost straight for entire length ............................
................. V. challengeri (Wolff, 1962) comb. n.
Pleotelson posterolateral spines relatively broad
at base, slightly curved forwards, propodi of
pereopods 1 and 5 relatively short, pleotelson
terminal spine apical part steeply bent
downwards ............................................................
.................... V. fragilis (Beddard, 1885) comb. n.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
6
16 Head with pair of long spines on low cones
behind antenna 1. Pleotelson terminal spine short
in dorsal view, posterolateral processes close to
apex .......................................................................
................... V. bicornis (Birstein, 1957) comb. n.
Head without spines ......................................... 17
17 Pleotelson terminal spine long, acute,
"resembling the outer part of an ordinary
fountain-pen" (Wolff 1962) ..................................
..................... V. chelata (Birstein, 1957) comb. n.
Terminal process broad, rounded in dorsal view...
.................. V. birsteini (Menzies, 1962) comb. n.
Vanhoeffenella georgei sp. n. (Figs 6-14)
Material examined. Holotype male 24.2 mm
(ZMMU Mc 1379): RV Dmitriy Mendeleev, cruise
43, 12.4.1989, St. 4107, 41°45.7’S, 41°35.6’W,
depth 5180–5190 m. Paratypes: 2 males 18.2 mm
and 16.2 mm, 1 female 25 mm from type locality
(ZMMU Mc 1380); 1 male 21.3 mm, 2 females 22.5
mm and 16.2 mm long, 4 juvenile specimens from
St. 4109, 38°40’S, 48°10’W, depth 5225 m (ZMMU
Mc 1381).
Description of male holotype. Body (Figs 6a, b) 2.1
times as long as wide, 0.25 times as high as long,
dorsal surface finely granulated, without setae. Head
shorter laterally than medially from point between
antennae to posterior margin, this distance 0.35
times as long as head wide. Interantennular gap very
short, bases of antennae 1 almost meeting at middle.
Frons from point between antennae 1 to clypeus 0.17
times as long as head totally. Clypeus (Figs 6c, d)
1.6 times as wide as labrum, thick, 0.5 times in
dorsal view and 0.3 in frontal view as long medially
as labrum. Pereonite 1 without dorsal spine,
conspicuously shorter than each of subequal
pereonites 2-4. Dorsomedial spine of pereonites 2–4
as long as pereonite, very narrow in dorsal view and
broad in lateral view. Acute anterolateral projections
of pereonites 3 and 4 half as long as corresponding
coxae in dorsal view. Coxae of pereopods 1–4 short,
pointed anterolaterally, without spines. Pereonite 5
anterior margin with pair of short dorsal spines
directed forward, meeting medially in one point;
following pereonites with pair of low dorsal
longitudinal keels, distance between them greater
than that between spines of pereonite 5. Lateral
margins of pereonite 5 slightly concave, those of
pereonites 6 and 7 convex; anterolateral acute
corners of pereonite 5 somewhat longer and
narrower than those of pereonites 6 and 7, all of
them not projecting over natasoma outline. Pleonite
0.65 times as long as following convex anterior part
of pleotelson.
Pleotelson as long as wide, posterior margin
rounded, minute terminal and posterolateral
processes hardly visible only laterally and ventrally;
preanal ventral process rather short, rounded. Lateral
margins of pereonites and pleotelson smooth,
without setae.
Antenna 1 (Fig. 9) 0.6 times as long as body;
article 1 1.6 times as long as wide basally, central
part 0.7 times as thick as wide, distolateral lobe 0.4
times as long and 0.7 as wide as article; Article 2
almost half as long as article 1, with conspicuous
proximolateral process and distomedial acute
projection; articles 3–5 0.8, 0.4, and 0.45 times as
long as article 2 respectively; flagellar articles
numerous, very short, with small aesthetascs.
Antenna 2 (Fig. 6c) broken, only 4 basal articles
present. Article 3 narrower and shorter laterally than
article 2, with short distal triangular processes.
Mandibles (Fig. 7) incisor process with 4 cusps,
lacinia mobilis of left mandible with 5 teeth, spine
row with 21 and 22 members in left and right
mandibles respectively; palp slightly longer (1.1)
than mandibular body, article 2 somewhat curved,
narrowing in midline, 4 times as long as wide, 1.8
times as long as article 1, with 3 rather stout distal
setae, article 3 relatively narrow.
Maxilla 1 (Fig. 8) outer endite twice as wide as
inner one, inner endite tapering distally.
Maxilla 2 (Fig. 8) inner endite shortest, with 9-10
serrated stout setae distally.
Maxilliped (Fig. 9) endite with 14 broad coupling
hooks, distal margin concave, with 9-10 fan-setae
and numerous thin setae, endite 0.6 times as wide as
basis, palp 1.1 times as wide as basis; article 2
lateral length subequal to article width; article 3 0.3
times as long as article 2 laterally and 1.4 times
medially, article 4 medial lobe about half as long as
article 5, both with tuft of distal setae. Epipod acute
distally, 2.6 times as long as wide, lateral acute
projection situating on the midddle of lateral length,
lateral margin with small setae.
Pereopod bases gradually decreasing in length
and broadening from 1 to 5 and then increasing and
narrowing to the longest basis of P7 (length/width
ratios are 4.5, 3.7, 2.7, 2.3, 2.15, 3.3, 4.0
respectively). All bases with row of small spines and
plumose setae on dorsal margin.
Pereopod 1 (Fig. 10) about half as long as body;
ischium about half as long as basis, both articles
with sparse thin setae; merus 0.25 times as long as
basis; carpus longest, 1.1 times as long as basis,
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
7
slightly curved; propodus 0.7 as long and about half
as wide as carpus, both articles with ventral
transparent fringe and small setae; dactylus half as
long as merus.
Pereopod 2 (Fig. 11) carpus twice as long as
basis, propodus longest, 1.1 times as long as carpus,
both articles as wide as the same articles in pereopod
1, dactylus twice as long as merus.
Pereopods 3-4 missing, only bases present (Fig.
11).
Pereopods 5-7 (Figs 10, 12) slightly longer than
pereopod 1, length/width ratios of carpi 5-7 are 1.8,
1.7, 1.7 respectively; propodi length/width ratios are
2.5, 2.45, 2.4; propodi length/carpi length 1.32, 1.30,
1.22; dactyli 5–7 only slightly longer than meri, with
numerous thin, simple dorsal setae, dorsal claw with
acute inner projection near tip.
Pleopod 1 (Fig. 13) 2.5 times as long as wide
proximally, proximal half with longitudinal rounded
keels; midlength waist half as wide as proximal part,
distal half broadening, last distal part (0.1 of total
pleopod length) narrower than waist, with dense row
of small setae ventrally; distal margin of inner lobes
rounded, outer lobes narrow, acute.
Pleopod 2 (Fig. 14) protopod 1.4 times as long as
wide, area with musculature bulging, convex
ventrally, endopod inserted after 0.7 of protopod
length from basal margin, stylet 0.45 times as long
as protopod, with short tapering tip, not extending
beyond distal margin of protopod.
Pleopod 3 (Fig. 13) endopod rounded, with
numerous (~ 60) distolateral plumose setae, twice as
long as wide and 0.7 times as long as pleopod 2;
exopod 1.3 times as long as endopod, 2-segmented,
proximal article 0.25 as wide as endopod, distal
article 0.7 as long and 0.5 as wide as proximal one,
with 16 distal plumose setae and row of thin simple
lateral setae.
Pleopod 4 (Fig. 11) endopod semicircular, with
17 plumose setae on distomedial tip, exopod 1.1
times as long and 0.5 wide as endopod, with 18
distal plumose setae, lateral and medial margins with
dense row of fine setae.
Pleopod 5 (Fig. 8) of one broad lobe bent upwards
laterally and covering lateral parts of pleopods 3 and
4, distal margin with 10 setae.
Uropod (Fig. 6f) 0.45 as long as pleotelson;
protopod slightly broadening distally, with 2 distal
setae, 2.6 as long as wide; endopod about half as
wide and 1.1 times as long as protopod, with 3
strong unequal bifid and a few simple distal setae;
exopod half as wide and 0.6 times as long as
endopod, with two bifid distal setae.
Female paratype similar to male. Differences are
the following: in females lateral length of head
subequal to medial length from point between
antennae to posterior margin. Antenna 1 shorter than
in male, with articles 3–5 slightly narrower, articles
of flagellum more elongate. Bases of pereopods 3
and 4 more slender and shorter than in male.
Operculum (Fig. 14) oval, 1.3 times as long as wide.
Keel covered with small acute tubercules, distal part
elevated.
Etymology. The species is named after the
American isopodologist, Prof. Robert Y. George,
who described many species of Storthyngura, in
particular the very similar S. torbeni.
Remarks. The new species belongs to the group V.
novaezelandiae, which includes in addition to this
species and V. moskalevi sp. n. the species V. torbeni
(George, 1987) from the Puerto-Rico Trench and V.
eltaniae (George & Menzies, 1968) from the South-
Sandwich Trench. The group is characterized by the
triangular-rounded shape of the pleotelson, with
posterolateral projections almost invisible from
above. V. georgei sp. n. is most similar to V. torbeni
(Figs 15-20). The two species share the same
arrangement of dorsal spines on pereonites, and the
shape of the pleotelson. V. georgei sp. n. can be
distinguished by a more rounded pleotelson, a
smaller interantennular gap, longer coxae of
pereopod 1, rounder lateral margins of distal half of
pleopod 1, and a stouter protopod of uropod
(length/width ratio is 3 in V. georgei sp. n., about 5
in V. torbeni). V. georgei sp. n. is also very similar
to V. novaezelandiae (Beddard, 1885), (see Wolff
1962: pl. IV G-H, text-figs 66-68). All three species
have a natasoma outline similar to the one seen in
species of Eurycope. From V. novaezelandiae, V.
georgei sp. n. is distinguished by the more elongate
pleotelson, the closer position of the dorsomedial
spines on the anterior margin of pereonite 5, and V.
georgei sp. n. has the distal rounded part of pleopod
1 longer than that of V. novaezelandicae.
Distribution. Southern Atlantic ocean: Argentina
Basin, at depths of 5180-2552 m.
Vanhoeffenella torbeni (George, 1987)
(Figs 15-20)
Storthyngura torbeni George, 1987: 681-686,
figs 1-2.
Material examined. 27 males, 12 females,
specimens from the Zoological Museum, University
of Copenhagen: RV Akademik Kurchatov, cruise
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
8
14, 3.02.73, St. 1182, 19°53’S, 68°11’W, depth
6400 m, trawl Sigsby.
Remarks. Some details not illustrated or not clear in
the original description are presented in Figs 15-20.
Distribution. Atlantic ocean: Puerto Rico Trench, at
depths of 6400-8045 m.
Vanhoeffenella moskalevi sp. n. (Figs 21-29)
Material examined. Holotype female 28.2 mm
(ZMMU Mc 1382): RV Akademik Kurchatov,
cruise 11, 5.12.1971, St. 896, 56°52’S, 24°59’W,
depth 5600-5670 m, trawl Sigsby. Paratypes
(ZMMU Mc 1383): 1 damaged male about 33 mm, 1
natasoma of a female 14 mm, 1 female 17 mm
without head and pleotelson, all from type locality.
Description of female holotype. Body (Fig. 21) 3.2
times as long as pereonite 5 wide, if measured
without lateral projections, 0.2 times as high as long,
dorsal surface of body fine granulated, without setae.
Head medially 0.4 times as long as wide, lateral
length subequal to medial length, interantennular
distance 0.25 as wide as antenna 1 article 1, frons
0.23 times as long as head totally; clypeus 1.6 times
as wide as labrum, medially in dorsal view 0.5 times
and 0.3 times in frontal viewas long as labrum.
Pereonite 1 only slightly shorter than pereonite 4,
pereonites 2 and 3 subequal in length. Pereonite 1
without dorsal spine, dorsomedial spine of
pereonites 2–4 each subequal to pereonite in length,
narrow in dorsal view and with broad base.
Pereonites 3 and 4 anterolateral projections acute,
about half as long as coxal spines of corresponding
pereopods. Pereopods 1–4 coxal anterior spine
almost as long as pereonite laterally. Natasoma 1.5
times as long as anterior body part. Pereonites 5-7
with pair of dorsal spines directed forward, distance
between spines subequal for all three pereonites.
Frontal margin of pereonite 5 bearing laterally
protuberances that overlap by caudal margin of
pereonite 4; anterolateral corners projecting in long
spines 2.5 times as long as pereonite. Anterolateral
spines of following pereonites and pleotelson
gradually shortening; pleonite 0.65 times as long as
following convex anterior part of pleotelson.
Pleotelson as long as wide, lateral margins
flattened, raised upwards, on anterior third pair of
small triangular processes, posterior third with two
angular projections with incision inbetween,
posterior process rectangular, tapering. Preanal
ventral process of pleotelson long, tip furcate, with
rounded notch. Lateral margins of pereonites and
pleotelson smooth, without setae.
Antenna 1 (not illustrated separately) very similar
to that of male (see description of male, Fig 27), but
slightly shorter, with articles 2–5 somewhat
narrower, flagellar articles slightly longer than in
male.
Antenna 2 (Fig. 21) broken, only 4 basal articles
present. Articles 2-4 subequal in lateral length,
article 3 conspicuously longer than article 2
medially.
Mandibles (Figs 22, 23) incisor process with 4
cusps, lacinia mobilis of left mandible subequal in
length to incisor process, with 5 teeth, spine row
with 27 and 28 members in left and right mandibles
respectively; palp subequal in length to mandibular
body, article 1 slightly flattened, article 2
subcylindrical, somewhat curved, narrowing in
midline, about 4 times as long as wide, twice as long
as article 1, with 3 rather stout distal setae.
Maxilla 1 (Fig. 24) outer endite 2.3 times as wide
as inner endite.
Maxilla 2 (Fig. 24) middle endite shortest, outer
endite longest. Spine-like setae of middle and outer
endites relatively short.
Maxilliped (Fig. 24) endite with 16 coupling
hooks, endite distal margin denticulated, with 9-10
narrow fan setae and numerous thin setae, endite 0.7
times as wide as basis, palp 1.2 times as wide as
basis; article 2 laterally 1.4 times as long as medially
and 0.9 as long as wide; article 3 0.4 times as long as
article 2 laterally and 1.4 times medially; article 4
visibly longer laterally than article 3 and article 5,
article 4 medial lobe 0.6 as long as article 5, both
with tuft of distal setae. Epipod 2.3 times as long as
wide, distal corner rounded, lateral projection
situated on 0.6 of lateral length from proximal
margin.
Pereopods 1-7 bases length/width ratios are 4.76,
4.3, 4.0, 3.2, 1.8, 2.9, 3.9, respectively.
Pereopod 1 (Fig. 25) only three articles present:
ischium half as long as basis, both articles with
sparse thin setae; merus about 0.25 as long as basis.
Pereopods 2-4 missing, only bases present
(Fig. 25).
Pereopods 5-7 (Figs 25, 26): carpi 5-7
length/width ratios are 1.75, 1.8, 1.8, respectively;
propodi length/width ratios are 2.8, 2.6, 2.7; propodi
conspicuously longer (about 1.4 times) than carpi;
dactyli 5–7 slightly longer than meri.
Operculum (Fig. 21d) as long as wide, distal part
elevated, lateral and distal margins with plumose
setae. Keel with spine in the end of proximal one-
third, directed backwards.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
9
Pleopod 3 (Fig. 29) endopod 1.4 times as long as
wide and 0.7 times as long as pleopod 2, with
numerous (about 40) distolateral short plumose
setae, exopod 1.6 times as long as endopod, 2-
segmented, proximal article 0.3 times as wide as
endopod, almost 3 times as wide and 1.4 times as
long as distal article, the later bearing about 30 distal
plumose setae.
Pleopod 4 (Fig. 29) endopod without setae,
exopod as long and 0.4 times as wide as endopod,
with about 20 distal plumose setae.
Pleopod 5 (Fig. 29) of one broad lobe without
setae, bent upwards laterally and covering lateral
parts of pleopods 3 and 4.
Uropod (Fig. 25) 0.3 times as long as pleotelson;
protopod slightly broadening distally, with a few
distal setae, 3.3 times as long as wide distally and
5.5 times as wide proximally; endopod as long and
about half as wide as protopod, with 8 strong
unequal bifid setae distally; exopod 0.7 times as long
and as wide as endopod, with 3 bifid setae distally.
Description of male paratype. Differences to the
female are:
Antenna 1 (Fig. 27) 0.6 times as long as body,
article 1 1.7 times as long as wide basally, and 2.1
times as long as wide on middle part, article
thickness 0.8 of central part width, distolateral lobe
obliquely truncated distally, 0.4 as long as article;
article 2 half as long as article 1 and 1.2 times as
long as article 1 lobe, distomedial acute projection
conspicuous, with small seta, small proximolateral
process feebly projecting; articles 3–5 0.9, 0.2, and
0.3 times as long as article 2 respectively, flagellum
of numerous very short articles with aesthetascs.
Pleopod 1 (Fig. 27) 2.5 times as long as wide
proximally, midlength waist 0.4 times as wide as
proximal part, broadening distal half 1.6 times as
wide as waist, last distal narrow part 1.2 times as
wide as waist, with dense row of small setae
ventrally, distal margin of inner lobes rounded, outer
lobes narrow, directed laterally.
Pleopod 2 (Fig. 28) protopod 1.5 times as long as
wide, acute distomedial angle slightly projecting,
endopod inserted after 0.75 of protopod length from
basal margin, stylet 0.45 times as long as protopod,
with short tapering tip.
Etymology. The species is named after the marine
biologist, Dr. L. Moskalev, from the Shirshov
Institute of Oceanology, Moscow, who collected
most of the material used in this work.
Remarks. In spite of its long anterolateral spines of
pereonite 5 the new species can be assigned to the
group V. novaezelandiae because its pleotelson has a
smooth outline. V. moskalevi sp. n. is most similar to
V. eltaniae (George & Menzies, 1968) from the
South-Sandwich Trench (Figs 30-37). The two
species share a similar shape of the natasoma, the
arrangement of dorsal spines on pereonites 6-7, a
frontal margin of pereonite 5 laterally limited by
thick protuberances, and a male pleopod 2 tapering
distally. From V. eltaniae, V. moskalevi sp. n. is
distinguished by the lack of dorsal spines on the
head and pereonite 1, longer anterolateral processes
of pereonite 5, incised lateral margins of the
pleotelson, a furcate tip of the preanal process, a
broader maxillipedal palp, distal parts of male
pleopod 1 directed outwards, and a less protruding
mediodistal angle of the male pleopod 2 protopod.
Distribution. Atlantic ocean: South-Sandwich
Trench, at depths of 5600-5670 m.
Vanhoeffenella eltaniae (George & Menzies,
1968) comb. n. (Figs 30-37)
Storthyngura eltaniae George & Menzies, 1968:
289, fig. 8.
Material examined. 2 females 26.5 and 27.5 mm
long; one male 21.4 mm long and a strongly
damaged male: RV Akademik Kurchatov, cruise 11,
5.12.71, St. 896, 56°52’S, 24°59’W, depth 5600-
5670 m, trawl Sigsby; 2 males 17 and 12.2 mm long
and immature female 7.5 mm long: St. 898, 56°47’S,
24°56’W, depth 6050-6150 m.
Remarks. The females from St. 896 show no
differences except that one of them has a small
dorsomedial spine on pereonite 1 lacking in another
one, as in the male from the same station. The
morphology is depicted in Figs 30-37.
Distribution. Atlantic ocean: South-Sandwich
Trench, at depths of 5431-6150 m.
Vanhoeffenella myriamae (George & Hinton,
1982) comb. n. (Figs 38-43)
Storthyngura myriamae George & Hinton, 1982:
93-98, fig. 1.
Material examined. female, 17.5 mm long and 8
mm wide: RV Akademik Kurchatov, cruise 43, St.
4900, 31°27’S, 21°57’W, 4213-4260 m; 1 immature
female 16.4 mm long, St. 4905, 31°24.8’S,
01°50’W, depth 4725 m. Female 16.4 mm long,
German expedition “DIVA 1” RV Meteor, cruise
48/1, 22.7.00, St. 333, 19°07.6’S, 003°48.1’E, depth
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
10
5426 m; 1 female 21.5 mm long, St. 339, 18°19.4’S,
004°42.1’E, depth 5395 m.
Remarks. V. myriamae belongs to the «pulchra»
group, which until now includes 6 species. Wolff
(1962) studied in detail the types of Storthyngura
pulchra Hansen, 1897 from the Eastern Pacific and
of S. caribbea (Benedict, 1901) from the Caribbean
Basin. He united these species with his new S.
kermadecensis from the Kermadec Trench (off New
Zealand) as three subspecies of S. pulchra. After this
revision three other very similar species were
described: S. symmetrica Menzies, 1962 from the
South-Eastern Atlantic, S. unicornalis Menzies &
George, 1972 from the Peru-Chile Trench, and S.
myriamae George & Hinton, 1982 from the Angola
Basin. These six species share similar longitudinal
sharp keels on pereonites 5-7, similar concave lateral
margins of natasomal pereonites, with rounded,
projecting posterolateral corners, and very similar
details of all appendages. All these species are very
alike and following Wolff´s logic (1962) all of them
could be placed as subspecies of V. pulchra.
Unfortunately, in all these cases we have only type
material represented by one or a few specimens. V.
unicornalis and V. symmetrica, for example, were
described from immature specimens, and without
new material it is difficult to say anything definite
about the validity of these species. But the
geographical distance of type localities (see more
detailed distribution data of Storthyngura species in
Brandt & Malyutina 2002) and some morphological
distinctions (Figs 1d, 44-53 and the above key for
Vanhoeffenella) allow one to consider them all as
separate species.
To the differences noted by the authors, comparing
V. myriamae and S. caribbea I would like to add the
different direction of the dorsal keels on pereonite 5.
In contrast to V. myriamae they diverge in all other
species of the «pulchra» group. The presence of an
unusual long basal article of the maxillipedal palp,
shown by George & Hinton for V. myriamae and
noted as an apomorphy for this species, was not
confirmed after the study of the holotype and the
specimens from our material (Fig. 40).
Distribution. Atlantic ocean: Angola Basin, at
depths of 4660-5426 m, southern part of Brazilian
Basin, at depths of 4313-4260 m.
Vanhoeffenella caribbea (Benedict, 1901)
comb. n. (Figs 44-47)
Eurycope caribbea Benedict in Richardson, 1901:
559, fig. 29. – Richardson (1905: 493, fig. 548).
Storthyngura caribbea (Benedict, 1901). –
Vanhöffen (1914: 584), Hansen (1916: 132).
Storthyngura pulchra (Hansen, 1897). – Wolff
(1956: 116).
Storthyngura pulchra caribbea (Benedict, 1901). –
Wolff (1962: 138, pls VI F, VII E-F, VIII D; text-
figs 79f-g, 80g-j, 81f).
Material examined. 4 type specimens, including the
male lectotype selected by T. Wolff (USNM 23911):
RV Albatross, voyage 1887-1888, St. 2751, off
Windward Is. in West Indies, depth 1260 m.
Distribution. Atlantic ocean: off Windward Is. in
West Indies, at a depth of 1260 m.
Vanhoeffenella unicornalis (Menzies & George,
1972) comb. n. (Figs 48-51)
Storthyngura unicornalis Menzies & George, 1972:
9.55, fig. 37.
Material examined. Female 12 mm long, holotype
(USNM No 273623): RV Anton Bruun 15.10.65,
08°31’S, 81°40’W, depth 4332-4423m.
Remarks. In describing this species the authors
compared it only with V. caribbea, but the most
similar species is V. pulchra which also has a
dorsomedial spine on its head and differs from V.
unicornalis mainly by a different shape of the
posterolateral margins of the pleotelson (Fig. 1d).
Distribution. Pacific ocean: Peru-Chile Trench, at
depths of 4332-4423 m
Vanhoeffenella symmetrica (Menzies, 1962)
comb. n. (Figs 52-53)
Storthyngura symmetrica Menzies, 1962: 149, fig.
38F-I.
Material examined. Immature male 6.7 mm long,
holotype (AMNH No 12099): RV Vema 4.04.58,
36°34’S, 14°08’E, depth 4893 m.
Distribution. Southeastern Atlantic, at a depth of
4893 m.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
11
Vanhoeffenella chelata (Birstein, 1957) comb. n.
(Figs 54-55)
Storthyngura chelata Birstein, 1957: 962, Figs 1A,
2. – Wolff (1962: 133, Pl.VI B-C; text-fig. 78),
Birstein (1963: 117), Birstein (1970: 335).
Material examined. Male 31 mm long, lectotype:
RV Vitjaz, St. 2144, 48°25’N, 156°34’E, depth 6860
m.
Remarks. The types of V. chelata and V. bicornis
Birstein, 1957 (Figs 56, 57) are redrawn because
Wolff (1962), comparing them with V. pulchra,
noted that V. bicornis is the most similar species to
the pulchra group. In my opinion, V. chelata much
more resembles the members of the «pulchra» group
mainly by the similar shape of the pleotelson. V.
chelata has longer and more acute projections of the
body and an unusual projecting distal part of the
male pleopod 1. But as correctly noted by Wolff
(“how little taxonomic significance can be applied to
the length, shape and direction of spines”), the
general shape of the body and its main parts, for
example, the pleotelson, are more stable and
therefore more important features.
Distribution. Northwestern Pacific Trenches, at
depths of 5345-6860 m.
Vanhoeffenella bicornis (Birstein, 1957)
comb. n. (Figs 56-57)
Storthyngura bicornis Birstein, 1957: 965, figs 1B,
3. – Wolff (1962: 133, Pl.VI B-C), Birstein (1963:
117).
Material examined. Male 23 mm long, lectotype:
RV Vitjaz, St. 3214, 38°11’N, 143°56’E, depth
6156-6207 m.
Distribution. Northwestern Pacific Trenches, at
depths of 6156-8430 m.
Vanhoeffenella scotia (George & Menzies, 1968)
comb. n. (Figs 58-59)
Storthyngura scotia George & Menzies, 1968a: 284,
figs 5,6.
Material examined. About 30 specimens, many
fragments: RV Dmitriy Mendeleev, cruise 43,
9.3.89, St. 4097, 60°40.7’S, 54°40.6’W, depth
3070–3100 m; one immature female 6 mm long:
5.3.89, St. 4094, 60°42' S 41°03 W, depth 4070-
4570 m.
Distribution. Atlantic ocean: Scotia Sea, at depths
of 2450-4570 m.
Vanhoeffenella birsteini (Menzies, 1962)
comb. n. (Figs 59-60)
Storthyngura birsteini Menzies, 1962: 149, fig.40A-
B. – George & Menzies (1968a: 294, fig. 11).
Material examined. Female, 22.5 mm long and 9.6
mm wide with empty brood pouch, female with
oostegites, without pleotelson, posterior parts of 2
males and one females: RV Akademik Kurchatov,
cruise 11, 17.12.71, St. 926, 56°52’S, 24°59’W,
depth 5530-5650 m, trawl Sigsby, 1.5 m.
Remarks. Opercula of females with spine on ventral
keel.
Distribution. Atlantic ocean: Drake Passage, at
depths of 1720-3804 m, South-Sandwich Trench, at
depths of 5530-5650 m.
Sursumura gen. n.
Diagnosis. Head dorsally with pair of spines at
midlength, behind lateral margins of antennae 1.
Anterolateral corners of pereonite 3 rounded; body
without ventromedial spines, pleotelson tip acute,
bent upwards. Antenna 1 article 1 with medial spine,
distolateral lobe long, tongue-like; article 2 shorter
than article 1 lobe, with distomedial projection.
Antenna 2 article 1 well separated from article 2,
with lateral spine. Mandible palp narrow. Maxilliped
palp article 2 medial margin longer than article 3,
epipod lateral margin without acute projection.
Pereopods 5-7 carpi and especially propodi
relatively narrow, more than three times as long as
wide. Male pleopod 1 with definite waist at
midlength, male pleopod 2 stylet about half of
protopod length, exopod short. Pleopod 4 exopod
with one or a few plumose setae.
Description. Body strong, of large size (till 49 mm,
smallest known species 9.7 mm long). Dorsal head
spines on low elevations, frontal margin forming a
ridge. Frons short, steep, frontal arch low, triangular
in frontal view, with stout lateral bulges and medial
rounded projection, clypeus dorsally longer than
frontally. Ventral areas above and under slot for
mandibular articulation considerably swollen, these
cheeks visible in dorsal view. Pereonites 1-4 with
dorsomedial spine each, tergite subdivided into 2
parts by transverse groove. Dorsal surface of
natasoma granulated, rugged, with tubercles and
setae. Dorsal sutures between pereonites 5-7 visible
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
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12
at least on lateral portions, each pereonite with pair
of dorsal spines and anterolateral acute projection.
Pleotelson longer than broad dorsally, subdivided
into two parts: a large subrectangular anterior and a
small triangular posterior part, anterolateral corners
rounded (or acute in S. robustissima), anterolateral
projection on lateral margin directed outwards,
posterolateral projections situated on posterior third
of pleotelson. Usually one or two dorsomedial
spines along and a pair of minute spines dorsally
near midlength. Terminal process acute, somewhat
bent upwards, with small point of dorsal pore at the
base, preanal ridge feebly protruding.
Incisor process of mandible broad in dorsal and
ventral view, and narrow in frontal and medial view.
Pereopod 1 dactylar dorsal claw tapering distally.
Pereopods 3 and 4 conspicuously longer than
pereopod 2. Pereopods 5-7 carpus and propodus
elongated, oval, propodi subequal to carpi.
Male pleopod 2 exopod short. Pleopod 3 endopod
with a few and exopod with numerous plumose
setae. Both articles of pleopod 3 exopod subequal in
width.
Etymology. From Latin sursum, meaning “upward”,
referring to the upward-bent ‘tail’.
Species included. See the following key. Except for
the new ones all species are transferred from
Storthyngura.
Type species. Sursumura praegrandis (George &
Menzies, 1968), by present designation.
Distribution. Southern hemisphere: one species
collected in the Bellinsgausen Sea, at a depth of 400
m, and one in the Tasman Sea, at 4400 m; the
remaining species occur the South Antil region,
depth range is 884-7216 m.
Key to species of Sursumura gen. n.
1 Pleotelson terminal process acute. Pereonites 1-4
with one dorsomedial spine ............................... 2
Pleotelson terminal process furcate. Pereonites 1-
4 with 3 dorsal spines each ...................................
................. S. magnifica (Chardy, 1976) comb. n.
(tentative placement)
2 Pleotelson posterolateral processes directed
outwards or forwards. Body spines relatively
long .................................................................... 3
Pleotelson posterolateral processes directed
backwards. Body spines relatively short ...............
................................................... S. aberrata sp. n.
3 Pleotelson anterolateral corners and lateral
margin in front of posterolateral process acute .. 4
Pleotelson anterolateral corners and lateral
margin in front of posterolateral process rounded
............................................................................ 5
4 Pleotelson visibly longer than wide. Dorsum of
body finely granulate, without setae .....................
............. S. robustissima (Monod, 1925) comb. n.
Pleotelson 0.9 as long as wide. Dorsum with
spine-like tubercles and dense hair-like setules
.............. S. spinosissima (Brandt, 2002) comb. n.
5 Pleonite without dorsomedial spine ................... 6
Pleonite with dorsomedial spine ........................ 7
6 Pleotelson posterolateral processes directed
outwards. Antenna 2 article 1 with lateral spine ...
...................... S. abyssalis (Wolff, 1962) comb. n.
Pleotelson posterolateral processes directed
backwards. Antenna 2 article 1 without lateral
spine ......... S. atlantica (Beddard, 1885) comb. n.
7 Pleotelson relatively short, about as long as wide,
lateral margin between lateral processes almost
not projecting ........................................................
S. argentica (George & Menzies, 1968) comb. n.
Pleotelson relatively long, conspicuously longer
than wide, lateral margin between lateral
processes projecting ........................................... 8
8 Pleotelson anterolateral angles acute (about 30°).
Pereonite 5 with pair of dorsal spines ...................
S. praegrandis (George & Menzies, 1968) comb. n.
– Pleotelson anterolateral angles wide, almost
rectangular. Pereonite 5 with 3 dorsal spines ........
.... S. falcata (George & Menzies, 1968) comb. n.
Sursumura aberrata sp. n. (Figs 61-68)
Material examined. Holotype female 24.2 mm
(ZMMU Mc 1384): RV Akademik Kurchatov,
cruise 11, St. 864, 41°45.7’S, 41°35.6’W, 7216-
7200 m. Paratype female 25 mm (ZMMU Mc 1385),
from type locality.
Description of female. Body (Figs 61, 62) about 2.7
times as long as pereonite 5 wide, dorsal surface
very finely granulate, spines with short setae. Head
medially from point between antennae to posterior
margin 0.3 times as long as wide, distance between
bases of antennae 0.25 as wide as antenna 1 basally.
Frons depressed, sloping, 0.25 as long as head
totally, lateral bulges diverging with angle of about
90º, frontal arch short, clypeus 1.6 times as wide as
labrum, medially 0.6 times in dorsal view and 0.3
times in frontal view as long as labrum. Pereonite 1
slightly shorter than each of subequal pereonites 2-4;
pereonites 1–4 with dorsomedial spine each, quite
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Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
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sturdy, slightly shorter than pereonite. Anterolateral
projections of pereonite 4 acute, directed outwards,
almost half as long as coxal spine; coxae of
pereopods 1–4 with thin spines. Natasoma about 1.5
times as long as anterior body part. Pereonites 5-7
fused dorsomedially, without sutures, each pereonite
with pair of short dorsal spines, distance between
spines similar in all pairs; anterolateral corners of
pereonites 5-7 similar in shape and size, short,
subrectangular. Pleonite short, fully fused with
pereonite 7 and separated from pleotelson by suture.
Pleotelson 1.1 times as long as wide, having original
shape for genus: anterolateral rounded corners short,
broad, directed outwards, margin behind them
straight; posterolateral processes acute, half as wide
as anterolateral ones, directed backwards; terminal
projection caudally from insertion of uropods 0.23
times as long as pleotelson, rounded, with short
acute tip; preanal ventral process short, rounded;
dorsum with 2 medial blunt spines: posterior spine
smaller than anterior one, a pair of minute tubercles
behind the posterior spine. Lateral processes of
pereonites 5-7, pleotelson and terminal process of
pleotelson flattened and slightly bent upwards; body
lateral margins serrated, without setae.
Antenna 1 (Fig. 63) about 0.3 times as long as
body, article 1 two times as long as wide basally and
2.4 times as central part wide, central part almost as
thick as wide, with 2 small dorsal setae, medial spine
narrow, subequal in length to distolateral lobe.
Article 2 0.2 times as long as article 1,
conspicuously shorter than lateral lobe of article 1,
distal width together with distomedial process 0.4 of
article 1 central width; article 3 elongate, with few
small setae along medial margin, articles 3–5 2.5,
0.3, and 0.7 times as long as article 2 respectively,
flagellum of 23 short articles.
Antenna 2 (Fig. 63) broken, only 4 basal articles
present. Article 1 with lateral spine shorter than
article, article 2 distal margin slightly serrated,
article 3 dorsally almost twice as long as article 2,
distolateral spine longer than distomedial one.
Mandibles (Fig. 64) incisor process with 2 distinct
and 2 weak teeth; lacinia mobilis of left mandible
slender, shorter than incisor process, with 3 distal
teeth and basal boss, spine row with 16 and 19
members in left and right mandibles, respectively;
molar process tapering, obliquely truncated;
proximoventral part of mandibular body with acute
keel, proximal narrow acute projection well
separated from mandibular body. Palp slightly
shorter (0.9) than mandibular body, article 2
somewhat curved, 7.5 times as long as wide, 3.3
times as long as article 1, with 3 stout acute setae,
article 3 relatively narrow.
Maxilla 1 (Fig. 65) outer endite twice as wide as
inner one.
Maxilla 2 (Fig. 65) inner endite subequal in
length to central endite, with 7 sturdy comb-like and
many simple distal setae and long thin medial setae,
central endite with additional short stout finger-like
setae.
Maxilliped (Fig. 66) endite with 11 coupling
hooks, distal margin serrated, with 9-10 fan-setae
and numerous thin simple setae; palp article 2
medial margin slightly concave, 1.2 times as long as
that of article 3, article 4 longer than article 5
laterally, distomedial lobe of article 4 and article 5
with tuft of long setulated setae. Epipod rounded
distally, 3 times as long as wide.
Bases of pereopods (Figs 61b, c; 62c) subequal in
length, broadening from 1 to 4 and then slightly
narrowing to 7, length/width ratios are 9.5, 5.3, 4.4,
4.6, 5.7, 6.1, 5.8, respectively.
Pereopod 1 (Fig. 67) 0.4 times as long as body, all
articles with sparse small marginal setae; basis
longest, ischium 0.4 times, merus 0.2 times as long
as basis, carpus 0.85 times as long as basis, only
slightly curved; propodus 0.6 times as long and as
wide as carpus, both articles about 12 times as long
as wide; dactylus almost half as long as merus.
Pereopods 2-6 missing, only basis present.
Pereopod 7 (Fig. 67) 1.4 times as long as
pereopod 1, ischium 0.6 as long as basis; carpus
almost as long and 1.5 times as wide as basis, 3.3
times as long as wide, ventral margin straight, dorsal
margin somewhat convex; propodus as long and as
wide as basis, 5.5 times as long as wide, propodus
and carpus with short, thin plumose marginal setae;
dactylus half as long as propodus, with numerous
thin, simple dorsal setae, claws damaged.
Pleopod 2 (Fig. 62b) almost as long as wide,
margins with row of short plumose setae,
ventromedial keel rounded, granulated, basal part
with small acute process.
Pleopod 3 (Fig. 68) endopod rounded, about twice
as long as wide, with 3 or 4 distal plumose setae,
exopod slightly longer than endopod, with row of
thin simple lateral setae, basal article 0.25 times as
wide as endopod, distal article slightly narrower and
0.45 as long as proximal article, with 8 distal
plumose setae.
Pleopod 4 (Fig. 68) endopod subequal in size to
that of pleopod 3, exopod about half as wide and
0.85 times as long as endopod, with 1 distal plumose
seta.
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14
Pleopod 5 (Fig. 68) one lobe slightly larger than
pleopods 4 and 3.
Uropod (Fig. 68) 0.6 times as long as pleotelson;
protopod distally almost twice as wide as
proximally, with few distal unequal bifid setae, 2.9
times as long as wide distally and 5 times
proximally; exopod about 0.3 times as wide and 0.8
times as long as protopod, with 2 distal setae;
endopod missing.
Male unknown.
Etymology. From Latin aberratus, meaning
“unusual”.
Remarks. Sursumura aberrata sp. n. is
distinguished from all other species of Sursumura by
the unusual shape of the pleotelson and the
anterolateral projections of pereonites 5-7, which are
short, rectangular, and not projected anteriorly as in
the other species of Sursumura.
Distribution. Southern Atlantic ocean: South-
Sandwich Trench, at depths of 7216-7200 m.
Sursumura praegrandis (George & Menzies,
1968) comb. n. (Figs 69-70)
Storthyngura praegrandis George & Menzies, 1968:
291, figs 9, 10.
Material examined. One female, 16 mm long, one
male 17 mm long: RV Akademik Kurchatov, cruise
11, 10.12.71, St. 908, 60°13.5’S, 44°10’W, depth
5465-5474 m.; one female approximately 20 mm
long: 14.12.71, St. 916, 56°29.8'S. 50°51'W, depth
4664 -5631 m.; one female 29 mm long: 17.12.71,
St. 927, 52°40' S 56°08.4'W, depth 1660-1664 m.;
one female 21 mm long: St. 928, 52°15' S 56°51'W,
depth 1105 m; one female 37 mm long, 2 males 33.4
mm and 27.8 mm long: RV Dmitriy Mendeleev
cruise 43, 5.3.89, St. 4093, 60°43' S 41°14'W, depth
3700-3970 m.
Distribution. South Atlantic: Drake Passage, Scotia
Sea, at depths of 1105-5631 m.
Rectisura gen. n.
Diagnosis. Head domed dorsally, without spines,
frons steep. Anterolateral corners of pereonite 3
without projections. Pereonites 5-7 with dorsal
sutures, pleotelson tip rather broad, truncate or
concave. Antenna 1 article 1 without medial spine,
distolateral lobe rounded, weakly pronounced;
article 2 length subequal to lobe or slightly longer,
with distomedial process. Antenna 2 article 1
without lateral projection. Mandibular palp thin.
Medial margin of maxilliped palp article 2 not
shorter than that of article 3, article 3 conspicuously
narrower than article 2, lateral margin of epipod with
acute projection. Male pleopod 1 elongate, distal
one-fourth bulbous. Male pleopod 2 exopod short,
thick; stylet of endopod short, less than one third of
protopod length. Pleopod 4 exopod with one or a
few plumose setae.
Description. Body strong, elongate, widest at
pereonite 5. Head dorsally with longitudinal low
convexities like in a garlic bulb. Frontal margin
slightly ridged, with broad rounded antennal sockets.
Laterally projecting cheeks at mandibular
articulation point visible dorsally, ventral area
around articulation slot swollen; frontal arch
perpendicular to frons, low, narrow, triangular in
frontal view, with stout lateral bulges, clypeus long
in dorsal and short in frontal view. Pereonite 1 not
broader than head. Pereonites 1–4 with mediodorsal
spine on anterior margin each, pereonite 4
anterolateral projections small, acute. Frontal margin
of pereonites 5 and 6 rounded, pleonite fused with
pereonite 7 and separated from pleotelson by suture.
Body without well protruding ventromedial spines.
Pleotelson broadest anteriorly, almost as long as
broad, anterolateral corners projecting frontally or
laterally, posterolateral projections situated on
posterior one-third of pleotelson, ventral preanal
ridge well pronounced.
Antenna 1 basal article subtriangular, article 2
less than one-third as long as article 1, article 3 in
males much shorter and thicker than that in female.
Dorsal suture between articles 1 and 2 of antenna 2
invisible, only lateral and ventral suture line present.
Mandible incisor process broad in dorsal and in
ventral views and narrow in lateral view, lacinia
mobilis of left mandible relatively short, molar
process narrowing distally.
Pereopod 1 dactylar dorsal claw similar to that of
following pereopods. Pereopods 3-4 only slightly
longer than perepod 2. Pereopods 5-7 carpi about
twice as long as wide, ventral margins straight;
propodi oval, elongate, subequal in length to carpi,
about third as long as wide.
Male pleopod 1 bent ventrally, with serrated
longitudinal keels. Pleopod 3 endopod and exopod
with numerous distal plumose setae, exopod 2-
segmanted, both articles subequal in width. Pleopod
4 exopod with one or a few plumose setae.
Etymology. From Latin rectus, meaning “straight”,
referring to the truncated ‘tail’.
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Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
15
Species included. See the following key. Except for
the new ones all species are transferred from
Storthyngura.
Type species. Rectisura herculea (Birstein, 1957),
by present designation.
Distribution. Pacific ocean: northeastern Trenches,
depth 5461-9345 m; Kermadek Trench, depth 5340-
7000 m; Panama Basin, depth 2950. Atlantic ocean:
South Antil Region, depth 3380-5449 m.
Key to species of Rectisura gen. n.
1 Pleotelson lateral margin rounded in front of
posterolateral spines ........................................... 2
Pleotelson lateral margin angular in front of
posterolateral spines ........................................... 8
2 Pleotelson dorsally only with a medial spine
anteriorly and a pair of tubercles in the posterior
half ..................................................................... 3
Pleotelson dorsally with long spines: one
anteriorly and a pair of spines in the posterior
half ..................................................................... 7
3 Pleotelson apex concave, its angles projecting
laterally .............................................................. 4
Pleotelson apex straight cut, its angles not
projecting laterally ............................................. 5
4 Pleotelson posterolateral processes directed
frontally, apical process rather short, lateral
margins serrated ....................................................
........................ R. serrata (Wolff, 1962) comb. n.
Pleotelson posterolateral processes directed
laterally, apex prominent, furcate .........................
........................ R. furcata (Wolff, 1956) comb. n.
5 Natasoma spines long. Pleotelson posterolateral
processes directed frontally ...................................
................... R. distincta (Birstein, 1970) comb. n.
Natasoma spines rather short ............................. 6
6 Distance between pair of dorsal spines on
pereonite 5 equal to that on following pereonites.
Pleotelson posterolateral processes narrow, with
angles about 30° ....................................................
............... R. tenuispinis (Birstein, 1957) comb. n.
– Distance between pair of dorsal spines on
pereonite 5 longer than on following pereonites.
Pleotelson posterolateral processes with angles
about 60° .......................... R. richardsonae sp. n.
7 Body spines long, setulated. Pleotelson dorsally
covered with long setae .........................................
......... R. brachycephala (Birstein, 1957) comb. n.
Body spines rather short, without setae.
Pleotelson with 2 additional dorsomedial spines
except anterior one and pair on posterior half;
apex not protruding ...............................................
... R. sepigia (George & Menzies, 1968) comb. n.
8 Pleotelson relatively short, broader than long,
lateral spines long, truncated apex broad ..............
.................... R. kurilica (Birstein, 1957) comb. n.
Pleotelson relatively long, about as long as
broad, lateral spines short, apical process
relatively narrow ................................................ 9
9 Size large. Apex angles directed backwards .........
.................. R. herculea (Birstein, 1957) comb. n.
Size small. Head with more convex lobes. Body
spines long and thin. Pleotelson margins deeply
emarginate ..... R. vitjazi (Birstein, 1957) comb. n.
Rectisura richardsonae sp. n. (Figs 71-82)
Material examined. Holotype male 19.5 mm
(ZMMU Mc 1386): RV Akademik Kurchatov,
cruise 11, St. 908, 60°13.5’S, 44°10.6’W, depth
5465–5474 m. Paratypes (ZMMU Mc 1387): 1
damaged female about 17 mm; 1 female about 20
mm, with oostegites, without pleotelson; fragments
of 3 additional specimens; all from the type locality.
Description of holotype. Body (Figs 71, 72) with
fragile integument, 2.7 times as long as pereonite 5
wide, measured without lateral spines, dorsal surface
finely granulate, without setae. Head medially from
point between antennae to posterior margin 0.4
times as long as wide, distance between bases of
antennae 0.1 of basal antenna 1 width. Frons
depressed, sloping, 0.3 as long as head totally,
lateral bulges diverging under angle of about 40º,
frontal arch short, perpendicular to clypeus, clypeus
1.6 times as wide as labrum, medially 0.6 times in
dorsal view and 0.3 times in frontal view as long as
labrum. Pereonite 1 as wide as head; posterolateral
angles of pereonite 1 acute, those of following three
pereonites rounded, anterolateral projections of
pereonite 4 acute, minute, much shorter than coxal
spines; pereonites 1–4 dorsomedial spine on frontal
margin subequal to pereonite in length. Coxae of
pereopods 1–4 with thin spine-like anterior
projection subequal to pereonite's lateral length.
Natasoma 1.5 times as long as anterior body part.
Pereonite 5 with pair of thin dorsal spines on frontal
margin placed relatively far from each other,
following pereonites with pair smaller spines,
situated nearer to each other than those on pereonite
5; anterolateral spine-like projections of pereonite 5
twice as long as those of pereonites 6 and 7. Pleonite
half as long as following convex anterior part of
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pleotelson. Pleotelson about as long as wide.
Anterolateral acute processes directed outwards and
slightly forwards, posterolateral processes subequal
to anterolateral ones in size and shape, directed
outwards, terminal projection between uropods
short, straight truncate, with minute dorsal pore,
distance from the dorsomedial pore to posterior
margin 0.1 times as long as pleotelson, posterior
margin of terminal projection 0.2 as wide as
pleotelson; dorsum with medial anterior spine,
rounded bulge behind it and a pair of acute tubercles
in midlength; preanal ventral process rather long,
rounded. Lateral margins of pereonites and
pleotelson smooth, without setae.
Antenna 1 (Fig. 73) about 0.3 times as long as
body, article 1 1.65 times as long as wide basally,
central part 0.8 times as thick as wide, distolateral
lobe not distinctly separated. Article 2 inserted after
0.7 of article 1 length from basal margin, almost as
long as distolateral lobe of article 1, distal width
with conspicuous distomedial process 0.45 of article
1 central width, articles 3–5 0.8, 0.2, and 0.7 times
as long as article 2 respectively, flagellum of
numerous, very short articles, with aesthetascs.
Antenna 2 (Fig. 73) broken, only 4 basal articles
present. Article 3 dorsally twice as long as article 2,
distal spines rather narrow, distolateral spine slightly
longer than distomedial one.
Mandibles (Figs 74-76) incisor process broad in
dorsal and ventral views, and narrow in frontal and
inside views, with only 1 distinct tooth; lacinia
mobilis of left mandible shorter than incisor process,
with 5 teeth, spine row with 15 and 16 members in
left and right mandibles respectively; molar process
stout, narrowing in dorsal view, obliquely truncate;
proximal ventral part of mandibular body surround
with acute keel, proximal narrow acute projection
well separated from body. Palp slightly shorter (0.9)
than mandibular body, article 2 somewhat curved, 8
times as long as wide, 3 times as long as article 1,
with thin setae on surface and row of 22-23 distal
stout setae rounded distally, similar to marginal
setae of article 3.
Maxilla 1 (Fig. 82) outer endite twice as wide as
inner one, inner endite not angular distally.
Maxilla 2 (Fig. 77) inner endite shortest, with
numerous simple and 9-10 doubly serrated stout
setae distally, outer and central endites with 4 spine-
like distal setae, central endite with additional short
finger-like setae.
Maxilliped (Fig. 78) basis with proximomedial
process, endite with 17 coupling hooks, distal
margin inconspicuosly concave, with 9-10 fan-setae
and numerous strong and thin simple setae, endite
0.7 times as wide as basis; palp as wide as basis,
article 3 0.8 times as wide as article 2, article 3 0.3
times as long as article 2 laterally and 0.9 times
medially, medial margin almost straight; articles 4
and 5 narrow and elongate, article 4 longer than
terminal one. Epipod rounded distally, 2.6 times as
long as wide, distal half of lateral margin concave,
with tiny hook-like projection at central point.
Bases of pereopods gradually decreasing and
broadening from 1 to 5 and then increasing and
narrowing to longest basis of pereopod 7
(length/width ratios are 5.7, 3.7, 3.0, 2.7, 2.6, 3.3,
3.9 respectively).
Pereopod 1 (Fig. 79) 0.4 times as long as body,
ischium 0.6 times as long as basis, both articles with
sparse small setae, merus 0.2 times as long basis,
carpus longest, 1.1 times as long as basis,
conspicuously curved; propodus 0.6 times as long as
carpus, about half as wide as carpus, both articles
slender (about 13 times as long as wide), with small
setae on surface; dactylus almost half as long as
merus, dorsal claw stout, ventral claw forming
transparent scabbard for two setae inbetween.
Pereopod 2 (Fig. 79) ischium only slightly shorter
than basis, carpus broken, with stout unequal bifid
setae ventrally.
Pereopods 3-4 missing, only bases present (Fig.
79)
Pereopods 5-7 (Fig. 80) slightly longer than
pereopod 1, pereopod 5 having shortest and broadest
basis and largest carpus and propodus, pereopod 7
having opposite proportions; carpi 5-7 length/ width
ratios are 1.9, 1.9, 1.8 respectively, ventral margin
straight, dorsal margin convex, rounded; propodi
length/ width ratios are 2.7, 2.6, 2.5; propodus
slightly longer than carpus in all three legs (propodi
length/ carpi length ratios are 1.17, 1.2, 1.18 ).
Dactyli 5–7 only slightly longer than meri, with
numerous thin, simple dorsal setae, dorsal claw of
pereopod 5 triangular, without inner projection.
Pleopod 1 (Fig. 81) 3.5 times al long as proximal
wide, bent ventrally, with longitudinal serrated
keels; narrowing part (waist) elongate, 0.4 times as
wide as proximal part, distal one-fourth expanded,
1.5 times as wide as waist, looks like bulbous in
ventral view. Distal tip with dense row of small
setae ventrally, distal margin of inner lobes rounded,
outer lobes small, narrow, protruded backwards;
dorsal keels unvisible ventrally.
Pleopod 2 (Fig. 81) 1.4 times as long as wide,
pointed distomedially, lateral margin strongly
convex, distolateral margin with row of short
plumose setae, endopod inserted after 0.85 of
protopod length from basal margin, stylet 0.3 times
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17
as long as protopod, with short tapering tip; exopod
short, thick, with tuft of fine simple setae on outer
margin of hook, extrinsic musculature occupying
small central part of protopod.
Pleopod 3 (Fig. 82) endopod 0.7 times as long as
pleopod 2, rounded, 1.5 times as long as wide, with
17 distolateral plumose setae; exopod 1.3 times as
long as endopod, narrow, 0.2 as wide as endopod,
distal article 0.3 times as long as proximal article,
acute distally, with 18 distal plumose setae and row
of thin simple lateral setae.
Pleopod 4 (Fig. 82) endopod as long as wide,
exopod half as wide and 0.85 as long as endopod,
with 1 distal plumose seta.
Pleopod 5 (Fig. 82) one lobe slightly longer than
wide, banded laterally and covered lateral parts of
pleopods 4 and 3.
Uropod (Fig. 79) 0.6 times as long as pleotelson.
Protopod slightly broadening distally, with a few
distal setae, 3.3 times as long as wide distally and
6.6 times proximally. Endopod about half as wide
and 1.2 times as long as protopod, with 4 strong
unequal bifid and a few simple distal setae; exopod
slightly narrower and 0.6 times as long as endopod,
with 5 bifid distal setae.
Female paratype similar to the male except sexual
dimorphism. There are the following differences:
antenna 1 (Fig. 73) article 1 larger and following
article more slender, than in male, article 1 1.6 times
as long as basal wide, and 1.7 times as long as
central part wide, central part 0.7 as thick as wide.
Article 2 0.25 times as long as article 1, distally 0.3
times as wide as article 1 central part; article 3
almost twice as long as that in male, articles 3–5 1.4,
0.3, and 0.3 times as long as article 2 respectively,
flagellar articles numerous and short.
Mandibles (Fig. 75): central tooth of lacinia
mobilis longer than that in male, spine row with 17
and 18 members in left and right mandibles
respectively. Palp article 1 (Fig. 74) visibly longer
than that in male, article 2 twice as long as article 1,
both articles with numerous fine setae, article 2 with
distal row of 21 stout setulated setae. Propodi of
pereopods 5-7 more slender than those in male, for
example, length/width ratio of pereopod 5 propodus
is 3.8 (2.7 in male)
Operculum missing in the available specimen.
Etymology. The species is named after the famous
American isopodologist, Dr. Harriet Richardson.
Remarks. The new species is most similar to R.
tenuispinis (Birstein, 1957) and R. furcata (Wolff,
1956). These share the same arrangement of dorsal
spines on pereonites and the general shape of the
pleotelson. From R. tenuispinis, R. richardsonae sp.
n. is distinguished by the slightly different shape of
the pleotelson, with broader posterolateral acute
processes and a wider distance between the pair of
dorsal spines on pereonite 5. From R. furcata, R.
richardsonae sp. n. is distinguished by the short,
straight-cut pleotelson tip, which is more prominent
and furcate in R. furcata. A similar row of finger-
like distal setae on article 2 of the mandibular palp is
also exhibited by R. serrata (Wolff, 1962), R.
sepigia (George & Menzies, 1968), and R. furcata.
Distribution. Southern Atlantic ocean: Scotia Sea,
at depths of 5465–5474 m.
Storthyngura Vanhöffen, 1914
Storthyngura Vanhöffen, 1914: 583. – Hansen
(1916: 132), Birstein (1957: 962), Menzies (1962:
145), Wolff (1962: 118), George & Menzies (1968b:
277-279).
Diagnosis. Body relatively flattened, of small size
(2-6 mm). Head without dorsal spines (pair of
tubercles in S. vemae Menzies, 1962 and S.
magnispinis (Richardson, 1908)). Antenna 1 article
1 with almost parallel lateral contours, distolateral
lobe rounded, weakly pronounced, medial spine
usually small; article 2 longer than the lobe, narrow,
without distomedial process. Antenna 2 article 1
well separated from article 2, with small, spine-like
lateral projection. Pleotelson not pointed.
Description. Head with small lateral projections
near the insertion points of antennae 2 and
mandibles; interantennular distance about half of
antenna 1 basal width. Frons sloping, slightly
concave medially, frontal arch broad, smooth,
almost without lateral ridges.
Pereonite 1 subequal in width to cephalon.
Pereonites 2–4 with frontally directed dorsomedial
spine each, broad at base. Anterolateral corners of
pereonites 2 and 3 without projections in some
species, or in other species with small anterolateral
spines. Pereonites 5-7 fused, without dorsal sutures,
with 1 or 2 medial projections anteriorly on each
pereonite; sternum without spines. Pleotelson about
as long as wide, without dorsal spines, anterolateral
processes directed slightly frontally. Lateral margins
between antero- and posterolateral corners either
only slightly concave, or deeply cut frontally of the
posterolateral projections. Preanal ventral ridge very
short, rounded. All body margins with narrow
transparent border, containing sparse minute setae.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
18
Antenna 1 strongly sexually dimorphic, flagellum
in females with a few long articles only, in males
with numerous short articles.
Maxilla 2 outer and central endites with
additional small medial seta. Maxilliped endite
elongate, with few slender coupling hooks. Medial
margin of palp article 2 somewhat concave,
distinctly longer than that of article 3. Epipod lateral
margin without acute projection on midlength.
Pereopods 2-4 insignificantly increasing in length
from 2 to 4; carpi 3 and 4 with several unequally
bifid spinelike setae on ventral distal third (it was
studied only in S. elegans Vanhöffen, 1914, S. parka
Malyutina & Wägele, 2001). Pereopods 5-7 carpi in
S. elegans, S. parka and S. octospinosalis Menzies &
George, 1972 crescent-shaped, propodi narrow,
shorter than carpi. S. kussakini Brandt & Malyutina,
2002 is the only species having narrow carpi and
propodi of last pereopods, like species of
Storthyngurella. Pleopod 3 endopod with 3-4
plumose setae distally, distal article of exopod broad
distally; pleopod 4 exopod narrow, not reaching
apical margin of endopod, with 1 distal plumose
seta.
Remarks. Except for three species the published
descriptions are very brief, with incomplete
illustrations. Some species (for example, S. snanoi
Menzies, 1962 and S. octospinosalis) seem to have
been described from juvenile specimens. The real
relationships in this group could not be clarified
during the present work. This would be possible
when additional material becomes available for a
comparative study. A future analysis will perhaps
lead to further division of Storthyngura into at least
two more genera.
Species included. See following key.
Type species. S. elegans Vanhöffen, 1914.
Distribution. Northern hemisphere: one species
from the North Pacific, depth 5011 m, and four
species from the West Atlantic, depth 2257-5091 m;
all remaining species occur in the southern
hemisphere: in the East Pacific off Peru, depth 4173-
4923 m. and in the Antarctic, depth 181-3620 m.
Key to species of Storthyngura
1 Posterior margin of pleotelson with notches for
uropod insertions, terminal process and
posterolateral projections separated ................... 2
Posterior margin of pleotelson rounded ................
S. intermedia (Beddard, 1885) (tentative placement)
2 Anterolateral corners of pereonites 2 and 3
rounded .............................................................. 3
Anterolateral corners of pereonites 2 and 3
pointed, slightly projecting ................................ 6
3 Pereonite 1 without dorsomedial spine .............. 4
Pereonite 1 with dorsomedial spine ................... 5
4 Lateral spines of pleotelson pointed, terminal
projection with medial notch, Coxal spines long ..
.................................. S. elegans Vanhöffen, 1914
Lateral spines of pleotelson rounded, terminal
projection somewhat convex. Coxal spines short .
.................... S. parka Malyutina & Wägele, 2001
5 Natasoma broad. Pleotelson broader than long,
without dorsal spines .............................................
............... S. kussakini Brandt & Malyutina, 2002
Natasoma narrow. Pleotelson longer than broad,
with pair of dorsal spines ......................................
.......... S. octospinosalis Menzies & George, 1972
6 Body without dorsal spines, except for paired
minute tubercles on posterior part of pleotelson ...
............................ S. truncata (Richardson, 1908)
Body with dorsal spines ..................................... 7
7 Pereonites 6 and 7 without dorsal pair of spines ...
....................................... S. snanoi Menzies, 1962
Pereonites 6 and 7 with dorsal pair of spines ..... 8
8 Lateral projections of natasoma rounded apically .
....................................... S. vemae Menzies, 1962
Lateral projections of natasoma acute ...................
...................... S. magnispinis (Richardson, 1908)
Acknowledgements
The project was performed with partial financial
support of the Deutsche Forschungsgemeinschaft
(DFG), grant 436 RUS 17/20/02. It is also a
contribution of the DIVA 1 project, supported by
DFG grant Wa 530/27-1. I am deeply indebted to
colleagues from the Laboratory of Benthos in the
Shirshov Institute of Oceanology, Moscow, for the
privilege of being able to examine the Storthyngura
collections. I am grateful to B. Mezhov (Zoological
Museum of Moscow University), Dr. B. Kensley
(U.S. National Museum of Natural History,
Washington), Mrs. E. Borda (American Museum of
Natural History, New York), and Dr. N. Bruce,
former curator of Crustacea (Zoological Museum of
Copenhagen University), for the kind loan of the
type material of some Storthyngura species. I thank
Prof. Dr. W. Wägele and Prof. Dr. A. Brandt, and
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
19
also anonymous reviewers, whose remarks helped
improve the manuscript.
References
Birstein, Y. A. (1957): Certain peculiarities of the
ultra-abyssal fauna at the example of the genus
Storthyngura (Crustacea Isopoda Asellota). Zool.
Zh. 36: 961-984. [in Russian]
Birstein, Y. A. (1969): Crustacea Isopoda from the
Romanche Trench. Byull. Mosk. Obshch.
Ispytatelei Prir. Otdel Biol. 3: 50–69. [in Russian]
Birstein, Y. A. (1970): Additions to the fauna of
Crustacea Isopoda of the Kurilo-Kamchatka
Trench. Trudi Inst. Oceanol. im. P. P. Shirshova
86: 292-339. [in Russian]
Brandt, A. & Malyutina, M. V. (2002): Storthyngura
kussakini sp. n. from the Southern Ocean. Mitt.
Mus. Naturk., Berlin, Zool. Reihe 78: 97-107.
George, R.Y. & Menzies, R. J. (1968a): Species of
Storthyngura (Isopoda) from the Antarctic with
descriptions of six new species. Crustaceana 14:
275–301.
George, R.Y. & Menzies, R. J. (1968b): Distribution
and probable origin of the species in the deep-sea
isopod genus Storthyngura. Crustaceana 15: 171–
187.
Hansen, H. J. (1916): Crustacea Malacostraca III. V.
The order Isopoda. Danish Ingolf Exped. 3: 1-262.
Kussakin, O. G. (2003): Morskye I
solonovatovodnye ravnonogie rakoobrasnye
(Isopoda) cholodnix I umerennix vod severnogo
polushariya. T. III. Suborder Asellota. Part 3.
Family Munnopsidae. 381 pp., Nauka, St.
Petersburg. [in Russian]
Malyutina, M. V. (1999a): Storthyngurella, new
genus of Munnopsidae (Crustacea: Isopoda), with
descriptions of three new species from deep-sea
basins of the southern hemisphere. Mem. Mus.
Victoria 57: 267-285.
Malyutina, M. V. (1999b): New species of
Acanthocope (Crustacea, Isopoda, Munnopsidae).
Russ. J. Mar. Biol. 25: 320-329.
Malyutina, M. V. & Wägele, J. W. (2001):
Redescription of Storthyngura elegans Vanhöffen,
1914 and description of a new deep-sea species of
Storthyngura from the Peru Basin. Mitt. Mus.
Naturk., Berlin, Zool. Reihe 77: 277-295.
Menzies, R. J. (1962): The isopods of abyssal depths
in the Atlantic Ocean. Vema Res. Ser. 1: 79–206.
Vanhöffen, E. (1914): Die Isopoden der Deutschen
Südpolar Expedition 20, Zool. 7: 449-598.
Wilson, G. D. & Hessler, R. R. (1980): Taxonomic
characters in the morphology of the genus
Eurycope (Isopoda, Asellota) with a redescription
of Eurycope cornuta G. O. Sars, 1864. Cah. Biol.
Mar. 21: 241–263.
Wilson, G. D. (1989): A systematic revision of the
deep-sea subfamily Lipomerinae of the isopod
crustacean family Munnopsidae. Bull. Scripps
Inst. Oceanogr. Univ. California, San Diego 27: 1-
138.
Wilson, G. D., Kussakin, O. G. & Vasina, G. S.
(1989): A revision of the genus Microprotus
Richardson with descriptions of two new species,
M. acutispinatus and M. lobispinatus (Asellota,
Isopoda, Crustacea). Proc. Biol. Soc. Wash. 102:
339–361.
Wolff, T. (1962): The systematics and biology of
bathyal and abyssal Isopoda Asellota. Galathea
Rep. 6: 1-320.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
20
Fig. 1. Representatives of six genera of subfamily Storthyngurinae: a, Storthyngura elegans Vanhöffen, 1914 (from Malyutina & Wägele
2001); b, Microprotus caecus Richardson, 1910 (from Wilson et al. 1989); c, Storthyngurella hirsuta Malyutina, 1999 (from Malyutina
1999a); d, Vanhoeffenella pulchra (Hansen, 1897) gen. n. (after photographs in Wolff 1962); e, Rectisura richardsonae gen. n., sp. n.; f,
Sursumura praegrandis (George & Menzies, 1968) gen. n. (specimen from St. 927 (Kurchatov-11)).
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
21
Fig. 2. Representatives of subfamilies Acanthocopinae and Eurycopinae, with some details: a, Acanthocope; b, Eurycope
(arrows show distinctive features).
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
22
Fig. 3. Head and pereonite 1: a, Storthyngura Vanhöffen, 1914; b, Microprotus Richardson, 1910; c, Storthyngurella Malyutina, 1999; d,
Sursumura gen. n.; e, Vanhoeffenella gen. n.; f, Rectisura gen. n.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
23
Fig. 4. Comparison of important characters for the genera: a, Storthyngura; b, Microprotus; c, Storthyngurella.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
24
Fig. 5. Comparison of important characters for the genera: a, Vanhoeffenella; b, Sursumura; c, Rectisura.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
25
Fig. 6. Vanhoeffenella georgei sp. n., a-d, f: male holotype; e: female paratype. a, total dorsal view; b, total lateral view; c, head, dorsal
view; d, head, frontal view; e, female pereonite 5, ventral view; f, uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
26
Fig. 7. Vanhoeffenella georgei sp. n., male holotype: right and left mandibles.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
27
Fig. 8. Vanhoeffenella georgei sp. n., male holotype: maxilla 1, maxilla 2, and pleopod 5.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
28
Fig. 9. Vanhoeffenella georgei sp. n., male holotype: antenna 1 and maxilliped.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
29
Fig. 10. Vanhoeffenella georgei sp. n., male holotype: pereopods 1 and 7.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
30
Fig. 11. Vanhoeffenella georgei sp. n., male holotype: pereopods 2-4 and pleopod 4.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
31
Fig. 12. Vanhoeffenella georgei sp. n., male holotype: pereopods 5 and 6.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
32
Fig. 13. Vanhoeffenella georgei sp. n., male holotype: pleopods 1 and 3.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
33
Fig. 14. Vanhoeffenella georgei sp. n., male holotype: a, pleotelson, ventral view; b, male paratype, pleotelson without pleopod 1, ventral
view; c, female
p
arat
yp
e,
p
leotelson, ventral view,
p
leo
p
od 2 of male holot
yp
e.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
34
Fig. 15. Vanhoeffenella torbeni (George, 1987), female from St. 1182 (Kurchatov-14): a, total dorsal view; b, total lateral view; c, pereonite 5
ventral view
;
d
,
p
leotelson
,
ventral view
;
e
,
male
,
p
leotelson
,
ventral view
;
f
,
head of female
,
dorsal view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
35
Fig. 16. Vanhoeffenella torbeni (George, 1987), specimens from St. 1182 (Kurchatov-14): maxilliped and antenna 1.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
36
Fig. 17. Vanhoeffenella torbeni (George, 1987), female from St. 1182 (Kurchatov-14): left mandible and pleopods 3 -5.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
37
Fig. 18. Vanhoeffenella torbeni (George, 1987), female from St. 1182 (Kurchatov-14): maxilla 1 and 2.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
38
Fig. 19. Vanhoeffenella torbeni (George, 1987), male from St. 1182 (Kurchatov-14): pleopods 1 and 2.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
39
Fig. 20. Vanhoeffenella torbeni (George, 1987), specimens from St. 1182 (Kurchatov-14): pereopods 2 and 6 and uropods.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
40
Fig. 21. Vanhoeffenella moskalevi sp. n., female holotype: a, total dorsal view; b, total lateral view; c, pereonite 5 ventral view; d, pleotelson,
ventral view
;
e
,
frontal arch
,
cl
yp
eus and labrum
,
frontal view
;
f
,
head
,
dorsal view
;
g,
male
p
arat
yp
e
,
p
leotelson
,
ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
41
Fig. 22. Vanhoeffenella moskalevi sp. n., female holotype: right mandible.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
42
Fig. 23. Vanhoeffenella moskalevi sp. n., female holotype: left mandible.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
43
Fig. 24. Vanhoeffenella moskalevi sp. n., female holotype: maxilliped, maxilla 1 and 2.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
44
Fig. 25. Vanhoeffenella moskalevi sp. n., female holotype: pereopods 2-4 and 7, and uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
45
Fig. 26. Vanhoeffenella moskalevi sp. n., female holotype: pereopods 4-6.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
46
Fig. 27.
Vanhoeffenella
moskalevi
sp n male
paratype:
pleopod 1 antenna 1
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
47
Fig. 28. Vanhoeffenella moskalevi sp. n., male paratype: pleopod 2
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
48
Fig. 29. Vanhoeffenella moskalevi sp. n., male paratype: pleopods 3-5.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
49
Fig. 30. Vanhoeffenella eltaniae (George & Menzies, 1968), female, St. 896 (Kurchatov-11): a, total dorsal view; b, total lateral view; c,
p
ereonite 5
,
ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
50
Fig. 31. Vanhoeffenella eltaniae (George & Menzies, 1968): a, female, 26.5 mm long, St. 896, head, dorsal view; b, female, 27.5 mm long,
head, lateral view; c, male, 21.4 mm long, St.896, head, dorsal view; d, female head, frontal view; e, male pleotelson, ventral view; f, female
pleotelson, ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
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Fi
g
. 32. Vanhoeffenella eltaniae
(
Geor
g
e & Menzies
,
1968
),
female
,
St. 896: left mandible
,
maxilla 1 and maxilli
p
ed.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
52
Fig. 33. Vanhoeffenella eltaniae (George & Menzies, 1968), female, St. 896, antenna 1, maxilla 2.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
53
Fi
g
. 34. Vanhoeffenella eltaniae
(
Geor
g
e & Menzies
,
1968
),
female and male
,
St. 896
,
uro
p
od
,
p
ereo
p
ods 1-3.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
54
Fig. 35. Vanhoeffenella eltaniae (George & Menzies, 1968), female, St. 896, bases of pereopods 3 and 4 and pereopods 6 and 7.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
55
Fig. 36. Vanhoeffenella eltaniae (George & Menzies, 1968), male, St. 896, pleopods 1 and 2.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
56
Fig. 37. Vanhoeffenella eltaniae (George & Menzies, 1968), female, St. 896, pereopod 5 and pleopods 3-5.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
57
Fig. 38. Vanhoeffenella myriamae (George & Hinton, 1982), female holotype: a, total dorsal view; b, total lateral view; c, head, dorsal view;
d
,
p
leotelson
,
ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
58
Fig. 39. Vanhoeffenella myriamae (George & Hinton, 1982), female holotype: antenna 1 and mandible.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
59
Fig. 40. Vanhoeffenella myriamae (George & Hinton, 1982), female holotype: maxilla 1, maxilla 2 and maxilliped.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
60
Fig. 41. Vanhoeffenella myriamae (George & Hinton, 1982), female holotype: pleopods 2-5 and uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
61
Fig. 42. Vanhoeffenella myriamae (George & Hinton, 1982), female, St. 4900 (Kurchatov-43): a, total dorsal view; b, total lateal view; c,
head, frontal view; d, head, dorsal view; e, head, lateral view; f, pleotelson, ventral view. Immature female, St. 4905 (Kurchatov-43): g,
natasoma, dorsal view; h, pleotelson, lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
62
Fig. 43. Vanhoeffenella myriamae (George & Hinton, 1982), female, St. 339 (Meteor-48/1): a, total dorsal view; b, total lateral view; c and d,
pleotelson ventral view. Female from St. 333: e, natasoma, dorsal view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
63
Fig. 44. Vanhoeffenella caribbea (Benedict, 1901), male lectotype: a, total dorsal view; b, total lateral view; c, pleotelson, ventral view; d,
female paratype: pleotelson, lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
64
Fig. 45. Vanhoeffenella caribbea (Benedict, 1901), male lectotype: mandible and uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
65
Fig. 46. Vanhoeffenella caribbea (Benedict, 1901), male lectotype: antenna 1, maxilla 1, maxilla 2 and maxilliped; female paratype: an-
tenna 1.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
66
Fig. 47. Vanhoeffenella caribbea (Benedict, 1901), male lectotype: pereopods 1 and 5, and pleopods 3-5.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
67
Fig. 48. Vanhoeffenella unicornalis (Menzies, 1962), female holotype: a, total dorsal view; b, total lateral view; c, pleotelson, ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
68
Fig. 49. Vanhoeffenella unicornalis (Menzies, 1962), female holotype: mandibles.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
69
Fig. 50. Vanhoeffenella unicornalis (Menzies, 1962), female holotype: antenna 1, maxilla 1, maxilla 2, maxilliped.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
70
Fig. 51. Vanhoeffenella unicornalis (Menzies, 1962), female holotype: pleopods 3 –5, pereopods 5 and 7, and uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
71
Fig. 52. Vanhoeffenella symmetrica (Menzies, 1962), male holotype: a, total dorsal view; b, total lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
72
Fig. 53. Vanhoeffenella symmetrica (Menzies, 1962), male holotype: antenna 1, pleopods 1 and 2, and uropod.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
73
Fig. 54. Vanhoeffenella chelata (Birstein, 1957), male lectotype: a, total dorsal view; b, total lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
74
Fig. 55. Vanhoeffenella chelata (Birstein, 1957), male lectotype: a, head, dorsal view; b, head, frontal view; c, head, lateral view; d, pleotel-
son, ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
75
Fig. 56. Vanhoeffenella bicornis (Birstein, 1957), female paratype: a, total dorsal view; b, total lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
76
Fig. 57. Vanhoeffenella bicornis (Birstein, 1957), female paratype: a, head, ventral view; b, head, lateral view; c, pleotelson, ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
77
Fig. 58. Vanhoeffenella scotia (George & Menzies, 1968), female, St. 4097 (Mendeleev-43): a, total dorsal view; b, total lateral view; c,
pereonite 5, ventral view; d, pleotelson, ventral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
78
Fig. 59. Vanhoeffenella scotia (George & Menzies, 1968), female, St. 4097 (Mendeleev-43): a, head, dorsal view; b, head, ventral view; c,
head, lateral view; d, head, frontal view. Vanhoeffenella birsteini (George & Menzies, 1968), male, St.926 (Kurchatov-11): e, pleotelson,
ventral view; f, pleotelson, lateral view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
79
Fig. 60. Vanhoeffenella birsteini (George & Menzies, 1968), female, St.926 (Kurchatov-11): a, total dorsal view; b, total lateral view; c,
pleotelson, ventral view; d, head, frontal view; e, head, ventral view; f, dorsal view.
corr.:
Vanhoeffenella = Vanhoeffenura nom. nov., cf. Org. Divers. Evol. 4: 123, 2004
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
80
Fig. 61. Sursumura aberrata sp. n., female holotype: a, dorsal view; b, lateral view; c, lateral parts of pereonites 1-4, coxae and bases o
f
pereopods 1-4, ventral view; d, head, dorsal view; e, head, lateral view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
81
Fig. 62. Sursumura aberrata sp. n., female paratype: a, natasoma, dorsal view; b, natasoma, ventral view; c, natasoma, lateral view; d,
head of female holotype, frontal view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
82
Fig. 63. Sursumura aberrata sp. n., female holotype: antenna 1 and antenna 2.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
83
Fig. 64. Sursumura aberrata sp. n., female holotype: mandible.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
84
Fig. 65. Sursumura aberrata sp. n., female holotype: maxilla 1 and maxilla 2.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
85
Fig. 66. Sursumura aberrata sp. n., female holotype: maxilliped.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
86
Fig. 67. Sursumura aberrata sp. n., females, holotype and paratype: pereopods 1 and 7.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
87
Fig. 68. Sursumura aberrata sp. n., female paratype: pleopods 3-5 and uropod.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
88
Fig. 69. Sursumura praegrandis (George & Menzies, 1968), female, St. 927 (Kurchatov-11): a, total lateral view; b, total dorsal view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
89
Fig. 70. Sursumura praegrandis (George & Menzies, 1968), female, St. 927 (Kurchatov-11): a, natasoma, ventral view; b, head, lateral
view; c, head, frontal view; d, head, ventral view; e, head, dorsal view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
90
Fig. 71. Rectisura richardsonae sp. n., male holotype: a, total dorsal view; b, total lateral view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
91
Fig. 72. Rectisura richardsonae sp. n., female without head, paratype: a, ventral view; b, pereonite 5, ventral view; male holotype: c, head,
dorsal view; d, head, frontal view; e, pleotelson, ventral view.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
92
Fig. 73. Rectisura richardsonae sp. n., female paratype and male holotype: antenna 1 and antenna 2.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
93
Fig. 74. Rectisura richardsonae sp. n., female paratype and male holotype: mandible.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
94
Fig. 75. Rectisura richardsonae sp. n., female paratype: mandible.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
95
Fig. 76. Rectisura richardsonae sp. n., male holotype: mandible.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
96
Fig. 77. Rectisura richardsonae sp. n., male holotype and female paratype: maxilla 2.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
97
Fig. 78. Rectisura richardsonae sp. n., male holotype: maxilliped.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
98
Fig. 79. Rectisura richardsonae sp. n., male holotype: pereopods 1-4 and uropod.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
99
Fig. 80. Rectisura richardsonae sp. n., female paratype and male holotype: pereopods 5-7.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
100
Fig. 81. Rectisura richardsonae sp. n., male holotype: pleopods 1 and 2.
Malyutina: Revision of Storthyngura (Crustacea: Isopoda)
Org. Divers. Evol. 3, Electr. Suppl. 13 (2003)
101
Fig. 82. Rectisura richardsonae sp. n., male holotype: pleopods 3-5 and maxilla 1.
... The present paper is the second publication on and rami subequal in length. In a recent revision Storthyngurinae Kussakin, 2003 from the isopod Malyutina (2003) has split the large genus material of the recent Antarctic expedition Table 1. Differences between the genera Sursumura and Storthyngurella. ...
... The most important differences are marked in bold and italics. Further details can be found in Malyutina, 2003 about two thirds of protopod length elongate 3-4 truncate ANDEEP. The first paper (Malyutina & Brandt, 2004) dealt with the genus Storthyngura, the present paper is devoted to the genera Sursumura and Storthyngurella. ...
... Material was collected during the expedition ANT XIX-3 & 4 (ANDEEP I & II), February to April 2002, aboard RV 'Polarstern' in the Antarctic deep sea off the South Shetland Islands, the South Sandwich Islands and in the Weddell Sea by means of an epibenthic sledge (Fiitterer et al., 2003). Samples from the collec- S. aberrata Malyutina, 2003S. abyssalis (Wolff, 1962 S. qffinis Malyutina, 2004 S. angulata n. sp. ...
... Terminology and measurements follow Wilson (1989) and Malyutina (2003). Total body length was measured medially from the anterior edge of the cephalon to the posterior tip of the pleotelson. ...
Article
A new deep-sea genus of the asellotan family Munnopsidae Lilljeborg, 1864, Pirinectes Malyutina & Brix gen. nov., including two new species, is described from the abyssal manganese nodule area of the Clarion Clipperton Fracture Zone in the north-eastern tropical Pacific. The new genus of the subfamily Eurycopinae Hansen, 1916, which is distinguished genetically, differs morphologically from the other six genera of this subfamily by the unique combination of the following characters: a rostrum approximately one third of the cephalon width and as long as antenna I article 1, with rounded margins, and the fingerprint pattern surface; pereonites 5 and 6 are fused dorsomedially, pereonite 7 is free; antenna I article 1 is without distomedial lobe and with small a distolateral projection; epipod of the maxilliped is less than two thirds of basis length and ovoid. Unique for the subfamily is the long pereopod II ischium, which is longer than the basis. Such characteristics can only be found in some munnopsid genera of the subfamily Munnopsinae Lilljeborg, 1864. Confirmed as distinct species by genetic analysis, the two new species can be morphologically distinguished from each other via a difference in width of the cephalon rostrum, the length of the palp and epipod of the maxilliped, length and width of distomedial lobes of pleopod 1, the width of carpi of the pereopods I, V and VI, and the different ratio of the uropod rami length. An illustrated identification key to the species of the Pirinectes gen. nov. is presented.
... In the laboratory, the material was sorted and identified using an Olympus SZx7 dissecting microscope and a Nikon SMZ 1500, and illustrated with an Olympus SZx7 microscope, equipped with a camera lucida. Terminology and measurements follow Wilson (1989) and Malyutina (2003). Total body length was measured medially from the anterior edge of the head to the posterior tip of the pleotelsonic terminal spine. ...
Article
The present paper provides data of the world-wide distribution, abundance and diversity of the rare deep-sea munnopsid genus, Acanthocope Beddard, 1885 and presents an identification key to the 18 known species of Acanthocope. Two new species, Acanthocope puertoricana sp. nov. from the tropical abyssal area near the Puerto Rico Trench and Acanthocope galaica sp. nov. from the Galicia Bank, Northeastern Atlantic are described. Additionally, Acanthocope annulatus Menzies, 1962 and Acanthocope eleganta Malyutina and Brandt, 2004 have been collected in the Puerto Rico Trench area, whereas Acanthocope galatheae Wolff, 1962 were collected along a latitudinal transect crossing the tropical abyssal North Atlantic during the Vema-TRANSIT expedition. A. puertoricana is most similar to A. carinata Chardy, 1972 from the Northwestern Atlantic and differs from the latter by: a more slender body; a broader head; a more slender and shorter lateral projections of the pleotelson; the presence of ventral spines on natasome; and a longer uropod. A. galaica sp. nov. is most similar to A. spinicauda Beddard, 1885 and differs from the latter by having a more elongate pleotelson with almost straight lateral margins between lateral spines, whereas the margins are more convex in A. spinicauda. Pereopods 5 and 6 of A. galaica have broader carpi than in A. spinicauda.
... Depth was the most important factor determining isopod communities, and abundance and diversity are highest around 3000 m (83 species) in Isopoda. Russian SO deep-sea isopoda data were summarised by Malyutina (2003 Malyutina ( , 2004). Isopods brood what limits their dispersal capacities and might lead to evolution of species in situ at bathyal or abyssal depths (Brandt 1991, Raupach et al. 2009 and references therein). ...
Article
A list of genera represented in the hadal zone (>6000 m), 22 trenches, two trench faults, and two basins was compiled for Tanaidacea, Isopoda, Bivalvia and five classes of Echinodermata. Among these 161 genera, hadal endemics comprised only 4%, which is lower than the previous estimate. Geographic and bathymetric distributions were examined in four groups of genera based on their lower bathymetric distribution limits: i) 6001–7000 m, ii) 7001–8000 m, iii) 8001–9000 m and iv) greater than 9000 m. These groups were compared by the percentage of genera with a narrow and wide geographical distribution in the hadal zone and in the world ocean from intertidal to hadal depths. Most of the hadal genera were characterized by a wide geographic range at shallower depths and a narrow geographic range in the hadal zone. Almost half of the 161 genera considered in this study had lower limits at 6001–7000 m. The percentage of narrowly distributed in the hadal genera found only in one trench decreases from 72% to 4% from the first to fourth group, whereas the proportion of widely distributed genera known from four or more trenches increases from 3% to 70%. Lower limit of the vertical distribution is positively correlated with the number of trenches and other hadal areas where the genera occurred. The wide distribution of the deepest-dwelling genera at hadal depths suggests that the most successful colonization of the hadal zone results from the high tolerance of some genera to multiple factors, including hydrostatic pressure, food distribution, topography, and potential ecological interactions. The lower hadal zone seems to be inhabited mainly by ubiquists.
Chapter
Our knowledge on the deep-sea peracarids at a global scale is limited, and this gap in knowledge is still larger when we refer to the peracarids from off the coast of Argentina. With the aim of improving this situation, a complete and accurate inventory of the deep-sea isopods, cumaceans, and amphipods from off the coast of Argentina is presented. This inventory is based mainly on data taken from the literature, but some records provided in the GBIF database were included as well. A total of 126 stations taken during 24 oceanographic surveys carried out by seven countries were compiled. Isopoda showed the highest number of species (107 spp.) followed by Cumacea (50 spp.) and Amphipoda (47 spp.). A large amount of specimens, including many new species, has been collected in recent years and wait to be described. Thus, it is expected that the number of species recorded from the area substantially increases in the near future.
Article
Malyutina, Marina, Brandt, Angelika (2004): Acanthocopinae (Crustacea: Isopoda: Munnopsididae) from the Southern Ocean deep sea with the description of Acanthocope eleganta sp. nov. Zootaxa 550: 1-20, DOI: 10.5281/zenodo.157199
Article
Two new species of deep sea asellotes of the family Munnopsidae, Rectisura slavai sp. nov. and Storthyngura yuzhmorgeo sp. nov. are described from the manganese nodules area in the Clarion-Clipperton Fracture Zone of the Pacific Ocean. The discovery of these new species allowed re-examination of the taxonomic position of two similar species, Storthyngura ? intermedia (Beddard, 1885) from the Northeastern Basin of the Pacific Ocean and Ilyarachna defecta Menzies & George, 1972 from the Peru-Chile Trench, eastern Pacific Ocean. The species are moved to the genera Rectisura Malyutina, 2003 and Storthyngura Vanhöffen, 1914, respectively. Additional composition and distribution of the species of the genera are presented.
Article
We report three new species of isopod crustaceans that belong to a rare higher taxon of asellote Isopoda. This taxon does not fit into current classifications. The isopods occurred in abyssal soft sediments, near manganese nodules, and in the vicinity of hydrothermal vents. Given their wide spatial occurrence across the Atlantic and Pacific Oceans, a cosmopolitan distribution is assumed. A cladistic analysis revealed a close relationship with the Macrostylidae, a common representative of the deep-sea macrofauna. Analyses of character evolution across the Janiroidea showed sufficient synapomorphies to justify the erection of Urstylis gen. nov. and the new family Urstylidae based on the three new species. All taxa are described in this paper. Urstylidae is characterized, amongst other apomorphies, by an elongate habitus with spade-like head; uropods are long, styliform; one pleonite is free; antennal merus and carpus are relatively short; the first pereopod is carpo-propodosubchelate, and more robust and shorter than pereopod II. Several characters, such as the pereopods’ posterior scale-like claw that basally encloses the distal sensilla may be interpreted as ancestral when compared to the situation in the highly derived Macrostylidae.
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