Enteropsis tromsoensis Kim & Boxshall 2021, sp. nov.

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Cyclopoida; Ascidicolidae; Enteropsis; Enteropsis tromsoensis; Norway; Tromsø; Tromso; Seta; Charcot
• Online Access: https://zenodo.org/record/5047167; https://doi.org/10.5281/zenodo.5047167

Enteropsis tromsoensis sp. nov. (Figs. 182) Type material. Holotype ♀ (MNHN-IU-2014-21586) and paratype ♀ (dissected, MNHN-IU-2014-21499) from mçlycarpa fẚbrçsa (Stimpson, 1852) (MNHN-IT-2008-6485 = MNHN S1 / POL.B/54); off Tromsø, Norway, Norbi Cruise, RV "Jean Charcot", Stn CP 11 (69°52'N, 17°08'E), depth 250-300 m, Bouchet & Warén coll., 01 July 1975. Additional non-type material. 2 ♀♀ (MNHN-IU-2014-21587, intact) in mçlycarpa pçrculus Monniot C. & Monniot F., 1979; collected at type locality on same date. Etymology. The name of the new species is based on its type locality, Tromsø. Description of female. Body (Fig. 182A) eruciform, incompletely 7-segmented, consisting of cephalosome, first to fourth pedigerous somites, genital complex, and 1-segmented abdomen. Body length 2.23 mm; maximum with 682 μm (across second pedigerous somite). Cephalosome 360×490 μm, distinctly defined from first pedigerous somite; posterior part of body from second pedigerous somite narrowing posteriorly. Genital apertures positioned laterally on genital complex. Abdomen 250×290 μm, gradually narrowing posteriorly; anus opening dorsally; anal prominence and anal operculum absent (Fig. 182B). Caudal rami (Fig. 182B) tapering, about 2.9 times longer than wide (208×71 μm), with straight, sclerotized lateral margin and oblique medial margin, and tipped with 1 small spine (55 μm long). Rostrum absent. Antennule (Fig. 182C) broad, indistinctly 2-segmented, 70×50 μm; proximal segment un- armed; distal segment with 6 or 7 setae (3 setule-like and 2 with swollen articulated base); 1 small distal seta (indicated by arrowhead) present or absent. Antenna (Fig. 182D) consisting of proximal segment and large distal claw; proximal segment 45 μm long, with 1 small cusp subdistally; distal claw (or claw-like distal segment) 50 μm long, slightly curved, unarmed. Labrum (Fig. 182E) armed with 5 broad, spinulose, setiform processes along posterior margin, middle 3 processes about 33 μm in length and about 1.5 times longer than lateral 2. ...