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Scottocheres mipoensis n. sp., female. A, habitus, dorsal; B, urosome, dorsal; C, first 2 urosomal somites, ventral; D, right caudal ramus, dorsal; E, antennule; F, antenna; G, oral siphon and mandible; H, maxillule. Scale bars: A, 0.1 mm; B, C, G, 0.05 mm; DF, H, 0.02 mm.
Source publication
Twelve species of siphonostomatoid copepods mainly associated with marine invertebrates are recorded from Korean waters. Nine species are new to science: Arctopontius minutus n. sp., A. adelphus n. sp, and Dyspontius alatus n. sp. in the family Artotrogidae; Asterocheres horridus n. sp., A. cuspis n. sp., A. quadridens n. sp., Scottocheres mipoensi...
Contexts in source publication
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... mipoensis n. sp. (Figs. 21-23) Material examined. Two ♀♀, 1♂ from a sponge (as a fisheries bycatch), off Mipo (35°09′29″N, 129°10′17″E) in Pusan, 11 December 2014. Holotype (♀, intact, NIBR IV0000681227) has been deposited in NIBR, Incheon, Korea. Dissected paratypes (1♀, 1♂) are retained in the collection of the author. Female. Body (Fig. 21A) narrow, 1.01 mm long. ...
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... mipoensis n. sp. (Figs. 21-23) Material examined. Two ♀♀, 1♂ from a sponge (as a fisheries bycatch), off Mipo (35°09′29″N, 129°10′17″E) in Pusan, 11 December 2014. Holotype (♀, intact, NIBR IV0000681227) has been deposited in NIBR, Incheon, Korea. Dissected paratypes (1♀, 1♂) are retained in the collection of the author. Female. Body (Fig. 21A) narrow, 1.01 mm long. Pro some 629 μm long. Cephalothorax 327 × 295 μm, longer than wide. Second and third pedigerous somites 276 and 269 μm wide, respectively, only slightly narrower than cephalothorax, with rounded anterolateral and postero lateral corners. Fourth pedigerous somite 131 μm wide. Urosome (Fig. 21B) 4segmented. Fifth ...
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... of the author. Female. Body (Fig. 21A) narrow, 1.01 mm long. Pro some 629 μm long. Cephalothorax 327 × 295 μm, longer than wide. Second and third pedigerous somites 276 and 269 μm wide, respectively, only slightly narrower than cephalothorax, with rounded anterolateral and postero lateral corners. Fourth pedigerous somite 131 μm wide. Urosome (Fig. 21B) 4segmented. Fifth pedigerous so mite nearly as wide as genital doublesomite. Genital doublesomite 185 × 133 μm, slightly tapering in distal half, with pointed, toothlike process on lateral margin near genital aperture; lateral sides of dorsal surface de pressed, thus forming dorsal ridge along midline; genital aperture located ...
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... × 133 μm, slightly tapering in distal half, with pointed, toothlike process on lateral margin near genital aperture; lateral sides of dorsal surface de pressed, thus forming dorsal ridge along midline; genital aperture located dorsally at anterior 0.3 region. Minute paired gonopores present on ventral surface at anterior fourth of doublesomite (Fig. 21C). First abdominal somite 73 × 69 μm, gradually broadened distally. Anal somite 42 × 62 μm, distinctly wider than long, shorter than preceding somite. Caudal ramus (Fig. 21D) small, 19 × 19 μm, broadened distally, with few setules on dis tal part of inner margin, and armed with 6 setae; seta V longest, 173 μm long; seta IV second ...
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... dorsal ridge along midline; genital aperture located dorsally at anterior 0.3 region. Minute paired gonopores present on ventral surface at anterior fourth of doublesomite (Fig. 21C). First abdominal somite 73 × 69 μm, gradually broadened distally. Anal somite 42 × 62 μm, distinctly wider than long, shorter than preceding somite. Caudal ramus (Fig. 21D) small, 19 × 19 μm, broadened distally, with few setules on dis tal part of inner margin, and armed with 6 setae; seta V longest, 173 μm long; seta IV second longest, 111 μm long; seta VII (dorsal seta) inserted on papilliform exten tion of caudal ...
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... absent. Antennule (Fig. 21E) 289 μm long, 18segmented, but articulation between third and fourth segments incomplete; armature formula 1, 2, 2, 2, 2 / 2, 2, 2, 5, 2 / 2, 1, 2, 1, 1 / 1, 1 + aesthetasc, and 13; first seg ment with several minute spinules on anterior surface; all setae short and naked; aesthetasc on penultimate seg ment about 0.28 times as long ...
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... 18segmented, but articulation between third and fourth segments incomplete; armature formula 1, 2, 2, 2, 2 / 2, 2, 2, 5, 2 / 2, 1, 2, 1, 1 / 1, 1 + aesthetasc, and 13; first seg ment with several minute spinules on anterior surface; all setae short and naked; aesthetasc on penultimate seg ment about 0.28 times as long as antennule. Antenna (Fig. 21F) consisting of syncoxa, basis, small exopod and 2segmented endopod. Syncoxa short and unarmed. Basis 72 μm long. Exopod 12 × 6 μm, twice as long as wide, located at distal 1/3 of basis length, and armed with 3 small setae. Proximal endopodal segment about 45 μm long and unarmed; distal endopodal segment about 23 μm long, armed with 4 ...
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... siphon (Fig. 21G) thin, 636 μm long, and extend ing to level of leg 5. Mandible (Fig. 21G) fibrillike. Maxillule ( Fig. 21H) bilobed; inner lobe tapering, 41 × 19 μm, armed distally with 3 setae (144, 133, and 68 μm, respectively); outer lobe small, 11 × 5 μm, armed with 1 distal and 1 subdistal setae. Maxilla (Fig. 22A) with unarmed, 100 μm-long ...
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... siphon (Fig. 21G) thin, 636 μm long, and extend ing to level of leg 5. Mandible (Fig. 21G) fibrillike. Maxillule ( Fig. 21H) bilobed; inner lobe tapering, 41 × 19 μm, armed distally with 3 setae (144, 133, and 68 μm, respectively); outer lobe small, 11 × 5 μm, armed with 1 distal and 1 subdistal setae. Maxilla (Fig. 22A) with unarmed, 100 μm-long syncoxa; basis also 100 μm long, slender; terminal claw 68 μm long, gently ...
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... siphon (Fig. 21G) thin, 636 μm long, and extend ing to level of leg 5. Mandible (Fig. 21G) fibrillike. Maxillule ( Fig. 21H) bilobed; inner lobe tapering, 41 × 19 μm, armed distally with 3 setae (144, 133, and 68 μm, respectively); outer lobe small, 11 × 5 μm, armed with 1 distal and 1 subdistal setae. Maxilla (Fig. 22A) with unarmed, 100 μm-long syncoxa; basis also 100 μm long, slender; terminal claw 68 μm long, gently curved, and clearly articulated from ...
Citations
... Kuayguara gen. nov. shares the uniramous leg 4 with a 3-segmented exopod with the 7 genera included in the third group, but these taxa can be easily differentiated by the level of reduction patterns found on their leg 1: Ascidipontius, Chejupontius, Cryptopontius, Dyspontius, and Pulicitrogus exhibit a biramous 3-segmented leg 1, with the exopod formula: (I-0, 0-0; II, 3), (I-0; 0-1; II, I, 2 or II, I, 1), (I-1; I-1; III, 4 or III, 5), (I-1; I-1 or 0-1; II, 5 or II,4), (I-0; 0-1; II, 3), respectively, characterizing minor modifications in the pattern, showing only a few elemental reductions (Thorell 1859;Giesbrecht 1899;Sars 1918;Kim 1996Kim 1998Kim 2016Johnsson 2001;Farias et al. 2021;Lee and Kim 2023). This is completely different from Kuayguara gen. ...
Artotrogidae Brady, 1880 is a cosmopolitan family with 23 valid genera and 131 known species. However, a considerable number of these species were subject of reexaminations and redescriptions recently. With the crescent number of new species discovered, it is becoming possible to better understand their boundaries. This study presents a new genus and species of Artotrogidae, recovered from unidentified hosts in debris of benthonic samples from Todos-os-Santos Bay, northeastern coast of Brazil. Kuayguara etymatee gen. et sp. nov. exhibits an underdeveloped first leg, which possess an unsegmented protopod and 1-segmented exopod, a unique set of morphological characteristics that differentiates it from all other genera of the family.
... After more than a century, a total of eight species have been described: S. elongatus (Scott T and Scott A, 1894), S. longifurca Giesbrecht, 1897, S. stylifer Giesbrecht, 1902, S. gracilis Hansen, 1923S. latus Nicholls, 1944, S. laubieri Stock, 1967, S. stocki Malt, 1991, S. youngi Johnsson, 2002 and Scottocheres mipoensis Kim, 2016. As a consequence of these new species, some of the defining characteristics have been slightly modified. ...
... The species of Scottocheres form three groups according to antennule segmentation. The first one includes Scottocheres longifurca, S stylifer, S. mipoensis, and S. youngi with an 18-segmented antennule; the second includes S. latus and S. stocki with a 19-segmented antennule (Giesbrecht, 1897(Giesbrecht, , 1902Johnsson, 2002;Kim, 2016;Malt, 1991;Nicholls, 1944). The new species plus S. elongatus, S. gracilis, and S. laubieri form the third group with a 17-segmented antennule. ...
The siphonostomatoid copepod genus Scottocheres was established by Giesbrecht in 1897 and now includes nine species. Consequently, these new species introduced new characteristics that must be considered to define the genus. This study provides an emended diagnosis of the genus, describes a new species, discusses the geographic distribution and hosts of the genus, and includes a key to the species. The new species was found associated with the sponge Callyspongia in Todos-os-Santos Bay and can be distinguished from its congeners by a set of characters that includes the presence of a unique seta on the inner margin of the second endopodal segment of legs 1 to 4 and only two spines on the outer margin of third endopodal element of leg 1.
... Antennule segmentation patterns are built based on model proposed by Huys & Boxshall (1994). The number of setae and key segments such as the one with the aesthetasc provide the cues to trace the homologies and becomes strong characters used in diagnosis of genera and families, not only in Entomolepididae (Kim 2004, McKinnon 1988) but also in other families such as Asterocheridae (Conradi & Bandera 2011, Kim 2013 and Artotrogidae (Eiselt 1965, Kim 2016. ...
The Entomolepididae family is a small taxon with a very characteristic body morphology and is represented, in the Atlantic Ocean, by three genera and five species. A recent study in Todos-os-Santos Bay, in Bahia State, has revealed a new species of Spongiopsyllus and a new species and genus belonging to the Entomolepididae. The new species of Spongiopsyllus is found in association with the sponge Aplysina cauliformis (Carter, 1882) sampled at the Porto da Barra beach. It is distinguished from its congeners mainly by differences in the segmentation pattern of the antennule, endopod of antenna, and the setation of the maxillule, maxilla and maxilliped. The new genus and species from Parmulodinae Eiselt, 1959 is found in association with the sponge Aplysina solangeae Pinheiro, Hajdu & Custódio, 2007, sampled at the Yacht Club Beach. The genus differs from others Parmulodinae mainly due to segmentation pattern of the antennule, endopod of antenna, maxilliped and swimming legs.
Two new genera and four new species of siphonostomatoid copepods of the family Asterocheridae associated with sponges are described from the Korean East Sea (Sea of Japan). These new copepods are distinguishable from related genera and species by their diagnostic morphological characters as follows: Amalomyzon elongatum n. gen. n. sp. bears an elongated body, two-segmented rami of legs 2, a uniramous leg 3 with two-segmented exopod, and a rudimentary leg 4 represented by a lobe. Dokdocheres rotundus n. gen. n. sp. has an 18-segmented female antennule, a two-segmented endopod of antenna, and unusual setations of swimming legs, including three spines plus four setae on the third exopodal segment of legs 2–4. Asterocheres banderaae n. sp. has no inner coxal seta on leg 1 or 4, but has two strong, sexually dimorphic inner spines on the second endopodal segment of male leg 3. Scottocheres nesobius n. sp. bears elongate female caudal rami about six times longer than wide, a 17-segmented female antennule, and two spines plus four setae on the third exopodal segment of leg 1.
A new species of the diverse and widely distributed symbiotic copepod genus Asterocheres is described from the sea star Nidorellia armata (Gray, 1840) in Mexican waters of the Eastern Tropical Pacific. The new species resembles various other congeners by sharing several characters including: (1) a siphon extending to the intersection of the maxilliped, (2) a 21-segmented antennule, and (3) a 2-segmented mandible palp. It can be distinguished by the unique structure and ornamentation of the maxilla, the armature and proportions of the fifth leg, and its body shape.
This is the first documented record of Asterocheres from the Mexican Pacific and the first finding of a symbiotic copepod on this sea star host. Males, ovigerous females and copepodites were recorded from the host, thus suggesting a well-established symbiotic association. It is likely that copepods feed on the host’s tegument. Further studies will be needed to assess the reproductive traits and seasonality of this copepod as a symbiont.
