Prodoroixys antarctica Kim & Boxshall 2020, gen. et sp. nov.

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Enterogona; Didemnidae; Prodoroixys; Prodoroixys antarctica; Antarc*; Antarctic; Antarctica; Kerguelen Islands
• Online Access: https://doi.org/10.5281/zenodo.5699915; http://treatment.plazi.org/id/03C487CBEEAB3BC8FF4DFCDFFEC4FE8E

Prodoroixys antarctica gen. et sp. nov. (Figs. 336, 337) Typematerial . Holotype (intact ♀, MNHN-IU-2014- 21384), paratypes (5 intact ♀♀, MNHN-IU-2014-21385), and dissected paratypes (2 ♀♀, figured) from Synoicum salivum Monniot F. & Gaill, 1978 (MNHN-IT-2008-8621 = MNHNA 1/ SYN /28), Kerguelen Islands, MD 04 DR106 (49°00’18″S, 67°30’42’’E), “Marion Dufresne”, depth 206 m, Boury-Esnault coll., 01 March 1975. Additional material . 13 ♀♀ (MNHN-IU-2018- 1906) and 1 dissected ♀ from Synoicum sp., Kerguelen Islands, MD 04 DR 106; 17 ♀♀ (MNHN-IU-2018- 1907) from Aplidium sp., Kerguelen Islands, MD 03 Pr 61; 14 ♀♀ (MNHN-IU-2018-1908) from Synoicum sp., Kerguelen Islands. MD 04 DR 106. Etymology . The specific name of the new species refers to its distribution in the Antarctic. Descriptionoffemale . Body (Fig. 336A) similarto typical Doroixys , 1.09 mmlong. Prosome 0.89 mmlong, relatively narrow; dorsal cephalicshielddistinctly defined, with acutely pointed posterolateral horn-like process on each side. Metasome unsegmented, distinctly longerthan wide, graduallybroadeningposteriorly; fifthpedigerous somite completely fused with fourth. Freeurosome (Fig. 336B) 5-segmented: genital somite distinctly longer and wider than abdominal somites. Surface of abdominal somites densely ornamented with setules. Caudal ramus (Fig. 336C) about 2.3 timeslongerthan wide (68×30 μm) and as long as anal somite; ornamented with numerous setules: armed with 6 setae, 2 proximal setae positioned at 46% and 60% of ramus length; 4 distal setae blunt at tip; all caudal setae shorter than ramus width. [table omitted] Rostrum (Fig. 336D) 100×74 μm, tapering, setulose distally, slightly constricted at proximal third; apex rounded. Antennule (Fig. 336E) 154 μm long, 9- segmented; third segment with traces of 2 articulations; armatureformula 2, 17, 5, 3+aesthetasc, 3, 2+aesthetasc, 2, 2+aesthetasc, and 7+aesthetasc; setae crowded, all naked. Antenna (Fig. 336F) 4-segmented; proximal 3 segments shortand unarmed, terminal (secondendopodal) segment ...