Description of four new species of Chramesus LECONTE, 1868 from South America (Coleoptera: Curculionidae: Scolytinae)

Abstract

Four new species of Chramesus LECONTE, 1868 (Coleoptera: Curculionidae: Scolytinae) are described from South America: C. karavaevi, C. longus, C. nobilis and C. unespi.

Full text

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Koleopt. Rdsch. 90 (2020)
S
TÜBEN
, P.E. 1999: Taxonomie und Phylogenie der westpaläarktischen Arten der Gattung Kyklioacalles
g.n. (Coleoptera: Curculionidae: Cryptorhynchinae). – Stuttgarter Beiträge zur Naturkunde, Ser.
A (Biologie) 584: 1–38.
S
TÜBEN
, P.E. 2006: Revision der Kyklioacalles punctaticollis-Gruppe mit Anmerkungen zur Biologie
und evolutiven Adaptation der Arten (Coleoptera: Curculionidae: Cryptorhynchinae). – Snude-
biller 7: 214–234.
S
TÜBEN
, P.E. 2018: The Cryptorhynchinae of the Western Palearctic. – Die Cryptorhynchinae der
Westpaläarktis (Coleoptera: Curculionidae). – Mönchengladbach: Curculio Institute, 518 pp.
S
TÜBEN
, P.E. & A
STRIN
, J.J. 2010: Molecular phylogeny of the weevil genus Kyklioacalles Stüben, with
descriptions of a new subgenus Glaberacalles and two new species (Curculionidae:
Cryptorhynchinae). – Zootaxa 2662: 28–52.
Dr. Michael KOŠŤÁL
Střelecká 459, CZ – 500 02 Hradec Králové, Czechia (michael.kostal@iol.cz)
Koleopterologische Rundschau 90 331–342 Wien, September 2020
Description of four new species of
Chramesus L
ECONTE, 1868 from South America
(Coleoptera: Curculionidae: Scolytinae)
A.V.
P
ETROV
&
C.A.H.
F
LECHTMANN
Abstract
Four new species of Chramesus L
ECONTE, 1868 (Coleoptera: Curculionidae: Scolytinae) are de-
scribed from South America: C. karavaevi, C. longus, C. nobilis and C. unespi.
Key words: Coleoptera, Curculionidae, Scolytinae, Phloeosinini, Chramesus, taxonomy, Brazil, Peru.
Introduction
The tribe Phloeosinini includes 15 genera: Asiophilus J
ORDAL
, 2010, Carphotoreus
W
OOD
, 1973,
Catenophorus
N
UNBERG
, 1956, Chramesus
L
E
C
ONTE
, 1868, Cladoctonus S
TROHMEYER
, 1911,
Cortisinus W
OOD
, 2007, Dendrosinus
C
HAPUIS
, 1869, Hyledius
S
AMPSON
, 1921, Hyleops
S
CHEDL
, 1938, Microditica J
ORDAL
, 2010, Phloeocranus
S
CHEDL
, 1942, Phloeoditica S
CHEDL
,
1962, Phloeosinopsoides
S
CHEDL
, 1964, Phloeosinus C
HAPUIS
, 1869 and Pseudochramesus
B
LACKMAN
, 1939
(J
ORDAL
2010,
S
MITH
et al. 2017, W
OOD
2007,
W
OOD
& B
RIGHT
1992).
Of the 15 known genera worldwide, five are native to South America, Chramesus, Cladoctonus,
Cortisinus, Dendrosinus and Pseudochramesus (W
OOD
2007), while one exotic Phloeosinus
species was introduced into Peru (P
ETROV
2016,
S
MITH
et al. 2017).
The genus Chramesus is distinguished from other genera of Phloeosinini by its entire eye, broad
protibia, 5-segmented funicle and a strongly asymmetrical antennal club. This genus is distin-
guished from the closely allied Pseudochramesus by an antennal club unmarked by sutures
(W
OOD
1982). In South America the genus includes more than 40 species; seven of these have
been described from South America and the West Indies in the last decade (B
RIGHT
2019,
P
ETROV
&
M
ANDELSHTAM
2011).
Material and methods
All specimens listed below were collected by A.V. Petrov between 2010 and 2019. Specimens
are deposited in the following collections:
APP Alexander Petrov private collection, Moscow, Russia
MEFEIS Museu de Entomologia da FEIS/UNESP, Ilha Solteira, São Paulo State, Brazil
ZMM Zoological Museum of Moscow State University, Moscow, Russia
Male genitalia were placed in hot 10 % KOH. After 20–30 minutes of soaking the genitalia were
washed in 20 % acetic acid to neutralize the KOH and finally washed with water.
Images of beetle species were made with a Canon 50D camera and an MP-e65 mm macro lens.
Photos and drawings were made by A.V. Petrov.
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Koleopt. Rdsch. 90 (2020)
Fig. 1: Chramesus karavaevi, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
Chramesus karavaevi sp.n.
(Figs. 1, 5, 9)
TYPE LOCALITY: Satipo Province, Junín Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): P E R U: JUNÍN: 15 km NW Satipo, near Río Venado village, 1300 m
a.s.l., 11°11'35.2''S 74°46'07.0''W, 21.X.2015, ex liana, leg. A.V. Petrov. Paratypes: 34 , 28 , same locality
as holotype but 22.X.2017 (22 , 17 ) and 5.I.2019 (2 , 1 ) (APP).
DESCRIPTION: Male: Body length 1.90 mm, 1.63 times as long as wide. Body dark brown to
black; antenna and tarsi brown (Fig. 1a–b).
Head dark brown to black, dull. Frons broadly deeply concave from epistoma to vertex, lateral
margins elevated with short carina from the base of the antennal insertion to the middle of the
eyes (Fig. 1c); surface of frontal concavity glabrous, dull, with very thin, short and sparse pale
setae; upper part of frons flat, with longer sparse setae; vertex with sparse fine punctures; eye
entire; scape with short fine adjacent pale setae, antennal funicle 5-segmented, club strongly
asymmetrical, 2.45 times as long as wide, densely covered with brown setae (Fig. 5).
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
333
Pronotum dark brown, dull, wide, 0.65 times as long as wide, its maximum width at its base;
lateral sides are visibly narrowed anteriorly; lateral parts of pronotum with sparse very small
asperities, pronotal disc with round shallow punctures, without asperities; pronotum completely
covered with short, slender scale-like setae, central part of pronotal disc with dark brown scale-
like setae only, lateral parts of pronotal base and lateral sides with pale scale-like setae.
Elytra dark brown, dull, 1.12 times as long as wide, 1.83 times as long as pronotum; basal
margins of elytra procurved, elevated and armed by marginal crenulations; lateral margins
almost subparallel for ⅔ length of elytra, apices evenly round; disc with regular striae of deep,
large, circular punctures; intervals between punctures smaller than their diameters; interstriae are
two times as wide as striae, with central row of long bristles, each bristle in a row about three
times as long as wide, surface of interstriae covered by adjacent short, confused scales, each
scale as long as wide. Elytral interstriae 1 with rows of recumbent scales, in the inner part (along
suture) there is a row of pale hair-like scales and a central row of erect elongated pale bristles. In
the outer part there are only dark recumbent scales, interstriae 2–9 with five rows of dark recum-
bent scales and brown erect bristles. Declivity occupies posterior third of elytral length (Fig. 1d).
Metepisternum and metaventrite with short pale setae. Abdomen dark brown, with numerous
uniformly erect pale setae. Legs dark brown, with long pale setae, outer lateral side of protibia
with six tubercles, tarsi reddish brown.
Male genitalia: median lobe short, arcuate, apophyses (penis apodemes) 1.15 times as long as
median lobe; there are two vertical processes in the upper part of the lobe basis, two lower blades
and a long thin curved lower process with a hook at the top (Fig. 9). Tegmen circular. Spicule
nearly longer than aedeagus, arcuate with a sharp hook on distal end.
Female: body length 1.9–2.3 mm, similar to male except frons flat with transverse epistomal
groove, lateral margin not marked by an elevation, surface glabrous, dull, with adjacent dark
brown setae.
Paratypes: length 1.8–2.5 mm, 1.60–1.63 times as long as wide.
DIFFERENTIAL DIAGNOSIS: The new species is closely related to Chramesus vinealis
WOOD, 1971 and C. orinocensis WOOD, 1971 but can be distinguished by the sparse very fine
setae in the male frons, by the smaller sparse fine asperities in lateral parts of pronotum, by dark
scale-like setae on the central part of pronotal disc, dark recumbent scales in the outer part of
interstriae 1 and by its larger body size.
DISTRIBUTION: Known only from the type locality.
BIOLOGY: Monogamous species. Adults attack dying lianas. The galleries are built entirely in
the phloem and xylem of the liana. Beetles were collected in transversal biramous egg galleries.
Eggs are laid singly in niches on both sides of the gallery.
ETYMOLOGY: The new species is named in honor of the entomologist Alexander B. Karavaev
(Moscow, Russia).
Chramesus longus sp.n.
(Figs. 2, 6, 10)
TYPE LOCALITY: Huánuco Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): P E R U: HUÁNUCO: 37 km NNE Huánuco, Carpish Pass, 9°41'33.6''S
76°05'06.2''W, 2480 m a.s.l., 9.X.2017, leg. A.V. Petrov. Paratypes: same locality as holotype, 2 , 4  (APP).
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Fig. 1: Chramesus karavaevi, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
Chramesus karavaevi sp.n.
(Figs. 1, 5, 9)
TYPE LOCALITY: Satipo Province, Junín Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): P E R U: JUNÍN: 15 km NW Satipo, near Río Venado village, 1300 m
a.s.l., 11°11'35.2''S 74°46'07.0''W, 21.X.2015, ex liana, leg. A.V. Petrov. Paratypes: 34 , 28 , same locality
as holotype but 22.X.2017 (22 , 17 ) and 5.I.2019 (2 , 1 ) (APP).
DESCRIPTION: Male: Body length 1.90 mm, 1.63 times as long as wide. Body dark brown to
black; antenna and tarsi brown (Fig. 1a–b).
Head dark brown to black, dull. Frons broadly deeply concave from epistoma to vertex, lateral
margins elevated with short carina from the base of the antennal insertion to the middle of the
eyes (Fig. 1c); surface of frontal concavity glabrous, dull, with very thin, short and sparse pale
setae; upper part of frons flat, with longer sparse setae; vertex with sparse fine punctures; eye
entire; scape with short fine adjacent pale setae, antennal funicle 5-segmented, club strongly
asymmetrical, 2.45 times as long as wide, densely covered with brown setae (Fig. 5).
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
333
Pronotum dark brown, dull, wide, 0.65 times as long as wide, its maximum width at its base;
lateral sides are visibly narrowed anteriorly; lateral parts of pronotum with sparse very small
asperities, pronotal disc with round shallow punctures, without asperities; pronotum completely
covered with short, slender scale-like setae, central part of pronotal disc with dark brown scale-
like setae only, lateral parts of pronotal base and lateral sides with pale scale-like setae.
Elytra dark brown, dull, 1.12 times as long as wide, 1.83 times as long as pronotum; basal
margins of elytra procurved, elevated and armed by marginal crenulations; lateral margins
almost subparallel for ⅔ length of elytra, apices evenly round; disc with regular striae of deep,
large, circular punctures; intervals between punctures smaller than their diameters; interstriae are
two times as wide as striae, with central row of long bristles, each bristle in a row about three
times as long as wide, surface of interstriae covered by adjacent short, confused scales, each
scale as long as wide. Elytral interstriae 1 with rows of recumbent scales, in the inner part (along
suture) there is a row of pale hair-like scales and a central row of erect elongated pale bristles. In
the outer part there are only dark recumbent scales, interstriae 2–9 with five rows of dark recum-
bent scales and brown erect bristles. Declivity occupies posterior third of elytral length (Fig. 1d).
Metepisternum and metaventrite with short pale setae. Abdomen dark brown, with numerous
uniformly erect pale setae. Legs dark brown, with long pale setae, outer lateral side of protibia
with six tubercles, tarsi reddish brown.
Male genitalia: median lobe short, arcuate, apophyses (penis apodemes) 1.15 times as long as
median lobe; there are two vertical processes in the upper part of the lobe basis, two lower blades
and a long thin curved lower process with a hook at the top (Fig. 9). Tegmen circular. Spicule
nearly longer than aedeagus, arcuate with a sharp hook on distal end.
Female: body length 1.9–2.3 mm, similar to male except frons flat with transverse epistomal
groove, lateral margin not marked by an elevation, surface glabrous, dull, with adjacent dark
brown setae.
Paratypes: length 1.8–2.5 mm, 1.60–1.63 times as long as wide.
DIFFERENTIAL DIAGNOSIS: The new species is closely related to Chramesus vinealis
WOOD, 1971 and C. orinocensis WOOD, 1971 but can be distinguished by the sparse very fine
setae in the male frons, by the smaller sparse fine asperities in lateral parts of pronotum, by dark
scale-like setae on the central part of pronotal disc, dark recumbent scales in the outer part of
interstriae 1 and by its larger body size.
DISTRIBUTION: Known only from the type locality.
BIOLOGY: Monogamous species. Adults attack dying lianas. The galleries are built entirely in
the phloem and xylem of the liana. Beetles were collected in transversal biramous egg galleries.
Eggs are laid singly in niches on both sides of the gallery.
ETYMOLOGY: The new species is named in honor of the entomologist Alexander B. Karavaev
(Moscow, Russia).
Chramesus longus sp.n.
(Figs. 2, 6, 10)
TYPE LOCALITY: Huánuco Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): P E R U: HUÁNUCO: 37 km NNE Huánuco, Carpish Pass, 9°41'33.6''S
76°05'06.2''W, 2480 m a.s.l., 9.X.2017, leg. A.V. Petrov. Paratypes: same locality as holotype, 2 , 4  (APP).
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Koleopt. Rdsch. 90 (2020)
Fig. 2: Chramesus longus, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
DESCRIPTION: Male: Body length 2.9 mm, 2.07 times as long as wide, body color reddish
brown. Pronotum and elytra covered with pale short setae (Fig. 2a–b).
Head dark brown to black, epistomal area reddish brown, mandibles black. Frons broadly
concave from epistoma to upper level of eyes, lateral margins of concave area acutely elevated
below and more strongly above level of antennal insertions, its crest very weakly subserrate,
without tubercles, with erect pale setae, epistoma with two long tufts of setae above mandibles
(Fig. 2c); vertex with numerous points without setae; lateral margins of epistomal part with
longer pale setae.
Antenna reddish brown, scape dark brown with brush of short pale setae, antennal funicle 5-
segmented, club strongly asymmetrical, 2.5 times as long as wide, top of the club weakly
pointed, surface covered with numerous short pale setae (Fig. 6).
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
335
Pronotum reddish brown, dull, 0.86 times as long as wide; widest at its base, sides subparallel in
basal half and apex simply rounded; surface strongly reticulated, closely armed by small
tubercles; vestiture of short pale numerous setae, uniformly distributed.
Scutellum very small, dark brown, rounded.
Elytra reddish brown, weakly shiny; 1.55 times as long as wide, 2.33 times as long as pronotum;
nearly cylindrical, sides subparallel in ¾ of the elytral length and broadly rounded towards apex;
elytra coarsely punctate on the disc, striae feebly impressed, punctures large, rounded, subequal
width with interstriae; interstriae with a row of fine numerous rounded tubercles, on the base of
declivity of elytra tubercles are larger and pointed. Declivity confined to less than posterior ⅓,
convex, steep, striae on declivity indicated but punctures smaller than on disc; each interstria
with row of pointed small tubercles (Fig. 2d). Vestiture consisting of longer pale interstriae setae
from disc to apex and fine short pale hairs on interstriae of declivity; setae shorter on the disc,
except setae on the first interstria.
Metepisternum, metaventrite and abdomen reddish brown, dull. Vestiture consisting of fine short
pale hairs.
Male genitalia: median lobe narrow, arcuate, apophyses (penis apodemes) 0.85 times as long as
median lobe, upper processes of sclerotized structure clearly higher than lobe basis, with two
long vertical processes, and two symmetrical lower blades (Fig. 10). Tegmen circular, ventral
side elongated. Spicule nearly longer than aedeagus, arcuate with a sharp hook on distal end.
Female: body length 2.7–2.9 mm, similar to male, but frons convex, except semi-rounded flat
area at the upper epistoma, central part of frons with a longitudinal raised line and lateral
margins weakly elevated. Vestiture consisting of fine short pale hairs, which are longer and more
abundant in the flat area and lateral margins of the upper epistoma. Antennal scape without brush
of short pale setae.
DIAGNOSIS: The new species is closely related to Chramesus macrocornis WOOD, 1971, but
can be distinguished by the rows of small tubercles on interstriae of the elytral declivity; by
characters of vestiture on disc and declivity of elytra; lateral crest on the male frons without large
tubercles; females with semi-roundish flat area in lower part of the frons.
DISTRIBUTION: Known only from the type locality.
HOST TREE: unknown.
BIOLOGY: Adults of C. longus are found within galleries in the xylem of trees which have died
from fire.
ETYMOLOGY: The epithet, a Latin adjective, refers to the elongated body form.
Chramesus nobilis sp.n.
(Figs. 3, 7, 11)
TYPE LOCALITY: Satipo Province, Junín Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): PERU: Junín Region, 15 km SW from Satipo, Río Venado vill.,
11°11'47''S 74°46.10''W, 1120 m a.s.l., ex Inga edulis, 12.II.2013, leg. A.V. Petrov. Paratypes: 4 , same locality
as in holotype, but 24.III.2013 (APP).
DESCRIPTION: Male: Body length 3.1 mm, 1.63 times as long as wide, body dark brown; an-
tenna and tarsus reddish brown. Pronotum and elytra covered with yellow scale-like setae (Fig.
3a–b).
Head dark brown, dull, lower part of the frons weakly shiny (Fig. 3c). Frons broadly deeply
concave from epistoma to vertex, crest of lateral margins elevated from antennal insertion to
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Koleopt. Rdsch. 90 (2020)
Fig. 2: Chramesus longus, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
DESCRIPTION: Male: Body length 2.9 mm, 2.07 times as long as wide, body color reddish
brown. Pronotum and elytra covered with pale short setae (Fig. 2a–b).
Head dark brown to black, epistomal area reddish brown, mandibles black. Frons broadly
concave from epistoma to upper level of eyes, lateral margins of concave area acutely elevated
below and more strongly above level of antennal insertions, its crest very weakly subserrate,
without tubercles, with erect pale setae, epistoma with two long tufts of setae above mandibles
(Fig. 2c); vertex with numerous points without setae; lateral margins of epistomal part with
longer pale setae.
Antenna reddish brown, scape dark brown with brush of short pale setae, antennal funicle 5-
segmented, club strongly asymmetrical, 2.5 times as long as wide, top of the club weakly
pointed, surface covered with numerous short pale setae (Fig. 6).
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
335
Pronotum reddish brown, dull, 0.86 times as long as wide; widest at its base, sides subparallel in
basal half and apex simply rounded; surface strongly reticulated, closely armed by small
tubercles; vestiture of short pale numerous setae, uniformly distributed.
Scutellum very small, dark brown, rounded.
Elytra reddish brown, weakly shiny; 1.55 times as long as wide, 2.33 times as long as pronotum;
nearly cylindrical, sides subparallel in ¾ of the elytral length and broadly rounded towards apex;
elytra coarsely punctate on the disc, striae feebly impressed, punctures large, rounded, subequal
width with interstriae; interstriae with a row of fine numerous rounded tubercles, on the base of
declivity of elytra tubercles are larger and pointed. Declivity confined to less than posterior ⅓,
convex, steep, striae on declivity indicated but punctures smaller than on disc; each interstria
with row of pointed small tubercles (Fig. 2d). Vestiture consisting of longer pale interstriae setae
from disc to apex and fine short pale hairs on interstriae of declivity; setae shorter on the disc,
except setae on the first interstria.
Metepisternum, metaventrite and abdomen reddish brown, dull. Vestiture consisting of fine short
pale hairs.
Male genitalia: median lobe narrow, arcuate, apophyses (penis apodemes) 0.85 times as long as
median lobe, upper processes of sclerotized structure clearly higher than lobe basis, with two
long vertical processes, and two symmetrical lower blades (Fig. 10). Tegmen circular, ventral
side elongated. Spicule nearly longer than aedeagus, arcuate with a sharp hook on distal end.
Female: body length 2.7–2.9 mm, similar to male, but frons convex, except semi-rounded flat
area at the upper epistoma, central part of frons with a longitudinal raised line and lateral
margins weakly elevated. Vestiture consisting of fine short pale hairs, which are longer and more
abundant in the flat area and lateral margins of the upper epistoma. Antennal scape without brush
of short pale setae.
DIAGNOSIS: The new species is closely related to Chramesus macrocornis WOOD, 1971, but
can be distinguished by the rows of small tubercles on interstriae of the elytral declivity; by
characters of vestiture on disc and declivity of elytra; lateral crest on the male frons without large
tubercles; females with semi-roundish flat area in lower part of the frons.
DISTRIBUTION: Known only from the type locality.
HOST TREE: unknown.
BIOLOGY: Adults of C. longus are found within galleries in the xylem of trees which have died
from fire.
ETYMOLOGY: The epithet, a Latin adjective, refers to the elongated body form.
Chramesus nobilis sp.n.
(Figs. 3, 7, 11)
TYPE LOCALITY: Satipo Province, Junín Region, Peru.
TYPE MATERIAL: Holotype  (ZMM): PERU: Junín Region, 15 km SW from Satipo, Río Venado vill.,
11°11'47''S 74°46.10''W, 1120 m a.s.l., ex Inga edulis, 12.II.2013, leg. A.V. Petrov. Paratypes: 4 , same locality
as in holotype, but 24.III.2013 (APP).
DESCRIPTION: Male: Body length 3.1 mm, 1.63 times as long as wide, body dark brown; an-
tenna and tarsus reddish brown. Pronotum and elytra covered with yellow scale-like setae (Fig.
3a–b).
Head dark brown, dull, lower part of the frons weakly shiny (Fig. 3c). Frons broadly deeply
concave from epistoma to vertex, crest of lateral margins elevated from antennal insertion to
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Koleopt. Rdsch. 90 (2020)
upper level of the eyes; surface of frontal concavity dull, except weakly shiny at the lower part of
the frons, evenly covered with small sparse points, with very thin, minute and sparse setae, setae
in concavity pale, very thin, of moderate length; upper part of frons and vertex without vestiture
with thickened apices, lateral parts of epistoma with long numerous setae; eye entire; vertex
evenly covered with sparse small points without setae; scape without brush of light setae, with
sparse long yellow setae, the top of the scape is very strongly thickened, antennal funicle 5-
segmented, club strongly asymmetrical, 2.6 times as long as wide, densely covered with short
setae (Fig. 7).
Fig. 3: Chramesus nobilis, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
Pronotum dark brown, dull, wide, 0.6 times as long as wide, its maximum width nearby base; ¾
of the anterior part of pronotum with abundant small asperities (very small in center of pronotal
disc), smaller part of pronotal disc without asperities, evenly covered with round points, intervals
with microreticulate; vestiture completely covered with long, brown and uniform scale-like
setae, apex of setae are directed to the base of pronotum.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
337
Scutellum very small, dark brown, wide, two times as wide as long.
Elytra dark brown, dull, 1.12 times as long as wide, 2.10 times as long as pronotum; basal
margins of elytra procurved, elevated and armed by marginal crenulations; lateral margins
almost subparallel at ⅔ length of elytra, apices evenly rounded; disc with regular striae of deep,
large, circular punctures; intervals between punctures smaller than their diameters; interstriae
two times wider as width of striae, with central row of round granules, interstriae on disc and de-
clivity with pointed granules, distance between granules equal to the diameter of a point in striae,
each interstria from base to apex of elytra with one central row of erect brown scale-like setae.
Metepisternum and metaventrite with short setae. Abdomen dark brown, with numerous uni-
formly long setae. Legs dark brown, with brown setae of medium length, tarsus reddish brown.
Male genitalia: median lobe arcuate, narrow, 4.1 times as long as wide, apophyses (penis apo-
demes) as long as median lobe, a sclerotized base structure is present in the lobe basis, with two
short symmetrical vertical processes, with two lower blades only (Fig. 11). Tegmen circular,
ventral site elongated. Spicule slightly longer than aedeagus, arcuate with a sharp hook on distal
end.
Paratypes: length 3.0–3.4 mm, 1.61–1.64 times as long as wide.
Female: unknown.
DIAGNOSIS: The new species is closely related to Chramesus flechtmanni PETROV & MANDEL-
SHTAM, 2011, but can be distinguished by strongly thickened scape and longer antennal club, by
the narrow form of the male genitalia, and larger body.
DISTRIBUTION: Known only from the type locality.
HOST TREE: Inga edulis (Fabaceae).
BIOLOGY: Chramesus nobilis attacks dead limbs of Inga edulis. Galleries were found in forks
of branches ranging from 20–25 mm in diameter.
ETYMOLOGY: The name is allusive to the large body size of this species. “Nobilis” (a Latin
adjective) means “noble”.
Chramesus unespi sp.n.
(Figs. 4, 8, 12–13)
TYPE LOCALITY: Brazil, state of Mato Grosso do Sul, Selvíria.
TYPE MATERIAL: Holotype  (MEFEIS): BRAZIL: MATO GROSSO DO SUL STATE: SELVÍRIA, UNESP
Farm, ex moist twigs of cut Acacia polyphylla tree, 20°23'10.1''S 51°24'39.2''W, 337 m a.s.l., 2.II.2011, leg. A.V.
Petrov. Paratypes: same locality as holotype, but 2.–9.II.2011 (9 , 8  in APP, 2 , 3  in MEFEIS).
DESCRIPTION: Male: Body length 2.53 mm, 1.93 times as long as wide, body dark brown and
elytra reddish brown; antennae and legs reddish brown. Pronotum covered with brown setae, and
elytra with yellow scale-like setae (Fig. 4a–b).
Head dark reddish brown, dull. Frons broadly deeply concave from epistoma to vertex, lateral
margins elevated and serrate from antennal insertion to middle of the eyes (Fig. 4c); surface of
frontal concavity weakly shiny, evenly reticulate, with deep median fossa and very thin, minute
and sparse setae, setae in concavity pale, very thin, of moderate length; upper part of frons and
vertex with longer and denser setae with thickened apices; eye entire; scape with a small tuft of
light setae, antennal funicle 5-segmented, club strongly asymmetrical, 1.9 times as long as wide,
densely covered with short light setae.
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336
Koleopt. Rdsch. 90 (2020)
upper level of the eyes; surface of frontal concavity dull, except weakly shiny at the lower part of
the frons, evenly covered with small sparse points, with very thin, minute and sparse setae, setae
in concavity pale, very thin, of moderate length; upper part of frons and vertex without vestiture
with thickened apices, lateral parts of epistoma with long numerous setae; eye entire; vertex
evenly covered with sparse small points without setae; scape without brush of light setae, with
sparse long yellow setae, the top of the scape is very strongly thickened, antennal funicle 5-
segmented, club strongly asymmetrical, 2.6 times as long as wide, densely covered with short
setae (Fig. 7).
Fig. 3: Chramesus nobilis, male; a) dorsal view, b) lateral view, c) frons, d) declivity view.
Pronotum dark brown, dull, wide, 0.6 times as long as wide, its maximum width nearby base; ¾
of the anterior part of pronotum with abundant small asperities (very small in center of pronotal
disc), smaller part of pronotal disc without asperities, evenly covered with round points, intervals
with microreticulate; vestiture completely covered with long, brown and uniform scale-like
setae, apex of setae are directed to the base of pronotum.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
337
Scutellum very small, dark brown, wide, two times as wide as long.
Elytra dark brown, dull, 1.12 times as long as wide, 2.10 times as long as pronotum; basal
margins of elytra procurved, elevated and armed by marginal crenulations; lateral margins
almost subparallel at ⅔ length of elytra, apices evenly rounded; disc with regular striae of deep,
large, circular punctures; intervals between punctures smaller than their diameters; interstriae
two times wider as width of striae, with central row of round granules, interstriae on disc and de-
clivity with pointed granules, distance between granules equal to the diameter of a point in striae,
each interstria from base to apex of elytra with one central row of erect brown scale-like setae.
Metepisternum and metaventrite with short setae. Abdomen dark brown, with numerous uni-
formly long setae. Legs dark brown, with brown setae of medium length, tarsus reddish brown.
Male genitalia: median lobe arcuate, narrow, 4.1 times as long as wide, apophyses (penis apo-
demes) as long as median lobe, a sclerotized base structure is present in the lobe basis, with two
short symmetrical vertical processes, with two lower blades only (Fig. 11). Tegmen circular,
ventral site elongated. Spicule slightly longer than aedeagus, arcuate with a sharp hook on distal
end.
Paratypes: length 3.0–3.4 mm, 1.61–1.64 times as long as wide.
Female: unknown.
DIAGNOSIS: The new species is closely related to Chramesus flechtmanni PETROV & MANDEL-
SHTAM, 2011, but can be distinguished by strongly thickened scape and longer antennal club, by
the narrow form of the male genitalia, and larger body.
DISTRIBUTION: Known only from the type locality.
HOST TREE: Inga edulis (Fabaceae).
BIOLOGY: Chramesus nobilis attacks dead limbs of Inga edulis. Galleries were found in forks
of branches ranging from 20–25 mm in diameter.
ETYMOLOGY: The name is allusive to the large body size of this species. “Nobilis” (a Latin
adjective) means “noble”.
Chramesus unespi sp.n.
(Figs. 4, 8, 12–13)
TYPE LOCALITY: Brazil, state of Mato Grosso do Sul, Selvíria.
TYPE MATERIAL: Holotype  (MEFEIS): BRAZIL: MATO GROSSO DO SUL STATE: SELVÍRIA, UNESP
Farm, ex moist twigs of cut Acacia polyphylla tree, 20°23'10.1''S 51°24'39.2''W, 337 m a.s.l., 2.II.2011, leg. A.V.
Petrov. Paratypes: same locality as holotype, but 2.–9.II.2011 (9 , 8  in APP, 2 , 3  in MEFEIS).
DESCRIPTION: Male: Body length 2.53 mm, 1.93 times as long as wide, body dark brown and
elytra reddish brown; antennae and legs reddish brown. Pronotum covered with brown setae, and
elytra with yellow scale-like setae (Fig. 4a–b).
Head dark reddish brown, dull. Frons broadly deeply concave from epistoma to vertex, lateral
margins elevated and serrate from antennal insertion to middle of the eyes (Fig. 4c); surface of
frontal concavity weakly shiny, evenly reticulate, with deep median fossa and very thin, minute
and sparse setae, setae in concavity pale, very thin, of moderate length; upper part of frons and
vertex with longer and denser setae with thickened apices; eye entire; scape with a small tuft of
light setae, antennal funicle 5-segmented, club strongly asymmetrical, 1.9 times as long as wide,
densely covered with short light setae.
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Koleopt. Rdsch. 90 (2020)
Pronotum dark reddish brown, weakly shiny, wide, 0.76 times as long as wide, its maximum
width around base; sides evenly rounded anteriorly; anterior and lateral parts of pronotum with
abundant small asperities, pronotal disc with round shallow punctures, intervals with reticulate
microsculpture; vestiture completely covered with long, light and uniform scale-like setae, apex
of setae directed to the disc center.
Scutellum small, dark brown, wide, two times as wide as long.
Elytra reddish brown, 1.28 times as long as wide, 1.82 times as long as pronotum; basal margins
of elytra procurved, elevated and armed by marginal crenulations; lateral margins slightly wider
than the basis, almost parallel for ⅔ length of elytra, apices evenly rounded; elytral surface
weakly shiny, finely reticulate, disc with regular striae of deep, large, circular punctures; inter-
vals between punctures smaller than their diameters; interstriae are a little wider than striae, with
central row of small granules, distance between granules equal to the diameter of a point in
striae, each interstria from base to apex of elytra with one central row of erect light scale-like
setae.
Abdomen dark reddish brown, with uniformly short pale setae. Legs brown, with yellow setae of
medium length.
Male genitalia: median lobe arcuate, apophyses (penis apodemes) as long as median lobe, a scle-
rotized base structure is present in lobe basis, without vertical processes, with two curved lower
blades (Fig. 8). Tegmen circular, ventral site elongated. Spicule slightly shorter than aedeagus,
arcuate with a sharp hook at distal end.
Female: body length 1.7–1.81 mm, similar to male, but frons flat, with weakly wide impression
in epistomal area, surface of the center finely shagreened, with small shallow punctures sparsely
scattered, very fine granular tubercles, covered by abundant and uniform short setae.
DIAGNOSIS: The new species differs from Chramesus brasiliensis N
UNBERG
, 1962 in the
scale-like vestiture of the elytral interstriae. Each interstria of C. unespi bears one central row of
scales (Fig. 13), while in C. brasiliensis there are three rows of setae (Fig. 14); from C. impolitus
W
OOD
, 1971 it differs in structure of frons and shape of a body. The male of C. impolitus has a
lower subquadrate lateral elevation at level of antennal insertion and upper part of elevation on
upper third just below upper level of eye, body 1.6 times as long as wide (W
OOD
2007).
DISTRIBUTION: Known only from the type locality.
HOST TREE: Acacia polyphylla (Fabaceae).
BIOLOGY: Adults of C. unespi were found within galleries in the xylem of felled trees, which
were without leaves, and stem and branches were starting to dry. Galleries were built in forks of
branches measuring 5–16 mm in diameter. The entrance hole was round, and equalling a beetle’s
body diameter. Parental galleries were engraved 2–4 mm into the xylem. There was generally
only a couple per gallery, rarely two females in addition to a male beetle. The gallery system
followed the usual pattern known for Chramesus species (B
RUCH
1940,
W
OOD
2007).
In most
cases the gallery system was biramous, with a nuptial chamber, a short gallery (10–13 mm long),
where the male would be found, and a longer (10–21 mm long) egg gallery, where the female
was present. Eggs were deposited in individual niches along the egg gallery. Trees were
simultaneously attacked by Hylocurus retusipennis B
LANDFORD
, 1898, Hypothenemus eruditus
(W
ESTWOOD
, 1834), Microcorthylus sp. and Sampsonius dampfi S
CHEDL
, 1940.
ETYMOLOGY: The epithet is formed by the acronym of the Universidade Estadual Paulista
(São Paulo, Brazil) to which the junior author is affiliated. The new species has been collected
on one of the compounds of that university. The word unespi is used as a noun in the genitive
case.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
339
Fig. 4: Chramesus unespi, male; a) dorsal view, b) lateral view, c) frons.
Figs. 5–8: Antennae of males of 5) Chramesus karavaevi; 6) C. longus; 7) C. nobilis; 8) C. unespi.
2106631_Kern.indd 340 15.10.20 07:33

338
Koleopt. Rdsch. 90 (2020)
Pronotum dark reddish brown, weakly shiny, wide, 0.76 times as long as wide, its maximum
width around base; sides evenly rounded anteriorly; anterior and lateral parts of pronotum with
abundant small asperities, pronotal disc with round shallow punctures, intervals with reticulate
microsculpture; vestiture completely covered with long, light and uniform scale-like setae, apex
of setae directed to the disc center.
Scutellum small, dark brown, wide, two times as wide as long.
Elytra reddish brown, 1.28 times as long as wide, 1.82 times as long as pronotum; basal margins
of elytra procurved, elevated and armed by marginal crenulations; lateral margins slightly wider
than the basis, almost parallel for ⅔ length of elytra, apices evenly rounded; elytral surface
weakly shiny, finely reticulate, disc with regular striae of deep, large, circular punctures; inter-
vals between punctures smaller than their diameters; interstriae are a little wider than striae, with
central row of small granules, distance between granules equal to the diameter of a point in
striae, each interstria from base to apex of elytra with one central row of erect light scale-like
setae.
Abdomen dark reddish brown, with uniformly short pale setae. Legs brown, with yellow setae of
medium length.
Male genitalia: median lobe arcuate, apophyses (penis apodemes) as long as median lobe, a scle-
rotized base structure is present in lobe basis, without vertical processes, with two curved lower
blades (Fig. 8). Tegmen circular, ventral site elongated. Spicule slightly shorter than aedeagus,
arcuate with a sharp hook at distal end.
Female: body length 1.7–1.81 mm, similar to male, but frons flat, with weakly wide impression
in epistomal area, surface of the center finely shagreened, with small shallow punctures sparsely
scattered, very fine granular tubercles, covered by abundant and uniform short setae.
DIAGNOSIS: The new species differs from Chramesus brasiliensis N
UNBERG
, 1962 in the
scale-like vestiture of the elytral interstriae. Each interstria of C. unespi bears one central row of
scales (Fig. 13), while in C. brasiliensis there are three rows of setae (Fig. 14); from C. impolitus
W
OOD
, 1971 it differs in structure of frons and shape of a body. The male of C. impolitus has a
lower subquadrate lateral elevation at level of antennal insertion and upper part of elevation on
upper third just below upper level of eye, body 1.6 times as long as wide (W
OOD
2007).
DISTRIBUTION: Known only from the type locality.
HOST TREE: Acacia polyphylla (Fabaceae).
BIOLOGY: Adults of C. unespi were found within galleries in the xylem of felled trees, which
were without leaves, and stem and branches were starting to dry. Galleries were built in forks of
branches measuring 5–16 mm in diameter. The entrance hole was round, and equalling a beetle’s
body diameter. Parental galleries were engraved 2–4 mm into the xylem. There was generally
only a couple per gallery, rarely two females in addition to a male beetle. The gallery system
followed the usual pattern known for Chramesus species (B
RUCH
1940,
W
OOD
2007).
In most
cases the gallery system was biramous, with a nuptial chamber, a short gallery (10–13 mm long),
where the male would be found, and a longer (10–21 mm long) egg gallery, where the female
was present. Eggs were deposited in individual niches along the egg gallery. Trees were
simultaneously attacked by Hylocurus retusipennis B
LANDFORD
, 1898, Hypothenemus eruditus
(W
ESTWOOD
, 1834), Microcorthylus sp. and Sampsonius dampfi S
CHEDL
, 1940.
ETYMOLOGY: The epithet is formed by the acronym of the Universidade Estadual Paulista
(São Paulo, Brazil) to which the junior author is affiliated. The new species has been collected
on one of the compounds of that university. The word unespi is used as a noun in the genitive
case.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
339
Fig. 4: Chramesus unespi, male; a) dorsal view, b) lateral view, c) frons.
Figs. 5–8: Antennae of males of 5) Chramesus karavaevi; 6) C. longus; 7) C. nobilis; 8) C. unespi.
2106631_Kern.indd 341 15.10.20 07:33

340
Koleopt. Rdsch. 90 (2020)
Figs. 9–12: Male genitalia (dorsal and lateral views, and spicule) of 9) Chramesus karavaevi; 10) C.
longus; 11) C. nobilis; 12) C. unespi.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
341
Figs. 13–14: Elytral vestiture of 13) Chramesus unespi; 14) C. brasiliensis.
Acknowledgements
The authors express their most sincere gratitude to Sergio Vanin (Museum of Zoology of the
University of São Paulo, Brazil) for providing access to the holotype of Chramesus brasiliensis.
Dr. Mikhail Y. Mandelshtam (St. Petersburg State Forest Technical University named after S.M.
Kirov, Russia) is thanked for critical proofreading of the manuscript.
References
B
RIGHT
,
D.E.
2019:
A taxonomic monograph of the bark and ambrosia beetles of the West Indies
(Coleoptera: Scolytidae). Studies on West Indian Scolytidae (Coleoptera) 7. – Occasional Papers
of the Florida State Collection of Arthropods 12: 1–491.
B
RUCH
,
C.
1940:
Dos comunicaciones coleopterológicas. – Revista de la Facultad de Agronomía de La
Plata (Ser. 3) 24: 19–28.
J
ORDAL
,
B.H.
2010:
Revision of the genus Phloeoditica Schedl – with description of two new genera and
two new species in Phloeosinini (Coleoptera, Curculionidae, Scolytinae). – ZooKeys 56: 141–
156.
P
ETROV
,
A.V.
2016:
New data and description of new species of bark beetles (Coleoptera: Curculionidae:
Scolytinae) from east slope of Cordillera Vilcabamba of Peru. – Russian Entomological Journal
25 (4): 1–8.
P
ETROV
,
A.V. &
M
ANDELSHTAM
,
M.Y.
2011: New data on bark beetles of the genus Chramesus
LeConte, 1868 with description of two new species from Peru. – Koleopterologische Rundschau
81: 269–275.
S
MITH
,
S.M.,
P
ETROV
,
A.V. &
C
OGNATO
,
A.I. 2017: Beetles (Coleoptera) of Peru: A survey of the
families. Curculionidae: Scolytinae. – The Coleopterists Bulletin 71 (1): 77–94.
W
OOD
,
S.L. 1982: The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae),
a taxonomic monograph. – The Great Basin Naturalist Memoirs 6: 1–1359.
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340
Koleopt. Rdsch. 90 (2020)
Figs. 9–12: Male genitalia (dorsal and lateral views, and spicule) of 9) Chramesus karavaevi; 10) C.
longus; 11) C. nobilis; 12) C. unespi.
PETROV & FLECHTMANN: Description of four new species of Chramesus (CURCULIONIDAE: Scolytinae)
341
Figs. 13–14: Elytral vestiture of 13) Chramesus unespi; 14) C. brasiliensis.
Acknowledgements
The authors express their most sincere gratitude to Sergio Vanin (Museum of Zoology of the
University of São Paulo, Brazil) for providing access to the holotype of Chramesus brasiliensis.
Dr. Mikhail Y. Mandelshtam (St. Petersburg State Forest Technical University named after S.M.
Kirov, Russia) is thanked for critical proofreading of the manuscript.
References
B
RIGHT
,
D.E.
2019:
A taxonomic monograph of the bark and ambrosia beetles of the West Indies
(Coleoptera: Scolytidae). Studies on West Indian Scolytidae (Coleoptera) 7. – Occasional Papers
of the Florida State Collection of Arthropods 12: 1–491.
B
RUCH
,
C.
1940:
Dos comunicaciones coleopterológicas. – Revista de la Facultad de Agronomía de La
Plata (Ser. 3) 24: 19–28.
J
ORDAL
,
B.H.
2010:
Revision of the genus Phloeoditica Schedl – with description of two new genera and
two new species in Phloeosinini (Coleoptera, Curculionidae, Scolytinae). – ZooKeys 56: 141–
156.
P
ETROV
,
A.V.
2016:
New data and description of new species of bark beetles (Coleoptera: Curculionidae:
Scolytinae) from east slope of Cordillera Vilcabamba of Peru. – Russian Entomological Journal
25 (4): 1–8.
P
ETROV
,
A.V. &
M
ANDELSHTAM
,
M.Y.
2011: New data on bark beetles of the genus Chramesus
LeConte, 1868 with description of two new species from Peru. – Koleopterologische Rundschau
81: 269–275.
S
MITH
,
S.M.,
P
ETROV
,
A.V. &
C
OGNATO
,
A.I. 2017: Beetles (Coleoptera) of Peru: A survey of the
families. Curculionidae: Scolytinae. – The Coleopterists Bulletin 71 (1): 77–94.
W
OOD
,
S.L. 1982: The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae),
a taxonomic monograph. – The Great Basin Naturalist Memoirs 6: 1–1359.
2106631_Kern.indd 343 15.10.20 07:33

342
Koleopt. Rdsch. 90 (2020)
W
OOD
,
S.L. 2007: Bark and ambrosia beetles of South America (Coleoptera: Scolytidae). – Provo:
Brigham Young University, 900 pp.
W
OOD
,
S.L.
&
B
RIGHT
,
D.E.
1992:
A catalog of Scolytidae and Platypodidae (Coleoptera), Part 2, Vol. A:
Taxonomic Index. – Great Basin Naturalist Memoirs 13: 1–833.
Dr. Alexander V. PETROV
Institute of Forest Science, RAS, Sovetskaya st., 21, Uspenskoe, Moscow Region, 143030, Russia (hylesinus@list.ru)
Dr. Carlos A.H. FLECHTMANN
Department of Plant Protection, FEIS/UNESP, Av. Brasil 56, Ilha Solteira, São Paulo, Brazil
(carlos.flechtmann@unesp.br)
Koleopterologische Rundschau 90 343–348 Wien, September 2020
Coleoptera species new to Finland (3)
(Coleoptera)
T. CLAYHILLS
Abstract
Sixteen Coleoptera species new to Finland are presented, mostly based on the author’s collections
during the years 2014–2018: Stenolophus teutonus (SCHRANK) (Carabidae), Acritus homoeopathicus
WOLLASTON, Margarinotus carbonarius (HOFFMANN) (Histeridae), Ptenidium turgidum THOMSON
(Ptiliidae), Carpelimus erichsoni (SHARP), Coproporus immigrans SCHÜLKE, Stenichnus poweri
(FOWLER), S. subseriatus FRANZ, Xantholinus audrasi COIFFAIT (Staphylinidae incl. Scydmaeninae),
Clambus simsoni B
LACKBURN (Clambidae), Sericoderus brevicornis MATTHEWS (Corylophidae),
Uloma culinaris (LINNAEUS) (Tenebrionidae), Euglenes nitidifrons (THOMSON) (Aderidae), Cyclo-
rhipidion bodoanum (REITTER), Hylesinus wachtli ssp. orni FUCHS, Xyleborus monographus
(FABRICIUS) (Curculionidae: Scolytinae). Faunistic data are provided.
Key words: Coleoptera, Aderidae, Carabidae, Clambidae, Corylophidae, Curculionidae, Histeridae,
Ptiliidae, Scolytinae, Scydmaeninae, Staphylinidae, Tenebrionidae, Finland, new records, faunistics.
Introduction
With the exception of the cold and rainy summer 2017, the years 2014–2018 were very warm,
with early springs and warm summers. The arrival of new faunal elements to northern countries
continued all this time, maybe even increased during these years. My mappings of Åland beetle
communities for the Biological station on Lemland, Nåtö continued, but they were decreasing
after the year 2017. The mapping of Joutseno municipality in south-eastern Finland was effectu-
ated by the increasing use of pitfall traps on dry meadow habitats.
All species listed here are new to the Finnish fauna or at least here confirmed for the first time to
occur in Finland!
Some of these species have been determined by foreign authorities and all are approved by the
Finnish expert group for checking beetle observations and announced as new to Finland in the
annual entomological meeting, mostly held in Helsinki (Vuosaari) but never published in ento-
mological journals.
The nomenclature follows RASSI et al. (2015).
For the abbreviations used in the text for Finnish biogeographical provinces see CLAYHILLS
(2011). BB 2019 = www.beetlebase.com/catalogus_list.asp.
Carabidae
Stenolophus teutonus (SCHRANK, 1781)
FINLAND: Al: Jomala, Möckelö (668529:310637), 8.IX.2014 (1 ex.), leg., det. & coll. Clayhills.
The teneral specimen was collected under seaweed from a meadow-like site at a small sandy
beach facing south. This species is known from Sweden and Denmark. Most likely, the species
has arrived from southern Sweden to the Åland Islands.
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