Doropygus antarcticus Kim & Boxshall 2020, sp. nov.

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Cyclopoida; Notodelphyidae; Doropygus; Doropygus antarcticus; Antarctic; Terre Adélie; Terre-Adélie; Seta; Antarc*; antarcticus; aurora australis
• Online Access: https://zenodo.org/record/6421635; https://doi.org/10.5281/zenodo.6421635

Doropygusantarcticus sp. nov. (Figs. 226, 227) Type material. Holotype ♀ (dissected and mounted on a slide, MNHN-IU-2014-21315) from Cnemidocarpa pfefferi Michaelsen, 1898, Antarctic (66°11 Ś, 143°21 É), CEAMARC 62EV303 (Beam Trawl AAD), Terre Adélie, “Aurora Australis” (66°11’S, 143°21’E), depth 532-550 m, IPEV-AAD-MNHN coll., 04 January 2008. Additionalmaterial. 1 copepodid V ♀ (dissected) from Cnemidocarpa drygalskii (Hartmeyer, 1911), Antarctic Stn 65EV322 (65°48 Ś, 143°04 É), depth 750- 788 m, 05 January 2008. Etymology. This species is named after the geographic region where the type locality is located. Descriptionoffemale. Body (Fig. 226A) narrow, 4.85 mmlong: prosome 3.92 mmlong, indistinctly segmented. Dorsal cephalic shield distinct; second and third pedigerous somites each with weakly developed epimera. Fourth pedigerous somite forming elongated, oval brood pouch (about 1.5 times longerthan wide in lateral view). Freeurosome (Fig. 226B) slender, inserted anteriorly on brood pouch. Genital somite 215×449 μm, twice as wide as long; 4 freeabdominal somites 431×369, 412×345, 252×308, and 234×283 μm, respectively. Caudalramus (Fig. 226C) slender, graduallynarrowing distally, about 7.0 times longerthan wide (596×85 μm) and about 2.5 times longer than anal somite: armed with 6 small setae; outer proximal and dorsal setae positioned at 23% and 66% of ramus length, respectively; setae at most as long as width of ramus at base. Rostrum (Fig. 226D) tapering towards rounded apex. Antennule (Fig. 226E) narrow, 660 μmlong, and 9- segmented; proximal 2 segments only slightly widerthan thirdsegment; armatureformula 3, 17, 6, 4+aesthetasc, 4, 3+aesthetasc, 2, 2+aesthetasc, and 7+aesthetasc; larger setae on first to fifth segments typically pinnate. Antenna (Fig. 226F) consistingof coxa, basis, and 2-segmented endopod; coxa shortand unarmed; basis 192×67 μm with 2 small (exopodal) setae at outer distal corner and 1 small inner seta distally; first endopodal segment 121×79 μm, unarmed, with convex outer margin; ...