Dorsiceratus andeep, George & Tönjes & Yurtdaş, 2025

Dorsiceratus andeep sp. nov.

Figs 16 View Figure 16 , 17 View Figure 17 , 18 View Figure 18

Locus typicus.

east of the Antarctic Peninsula, western Weddell Sea, Antarctica, station #133/8   GoogleMaps - C (65°20,09'S, 54°14,72'W, 1108.0 m water depth).

Type material.

Holotype: female, collected on 07. 03. 2002, put on one slide, collection number SMF-37295/1 GoogleMaps .

Etymology.

the epitheton andeep refers to the Expeditions ANtarctic benthic DEEP-sea biodiversity (ANDEEP) I + II of RV POLARSTERN (cruise PS 61) that had taken place in 2002 to the Scotia Arc, the Weddell Sea, and the Antarctic peninsula.

Description of female.

The body shape (not drawn) corresponds to the generic diagnosis with the pronounced frontal peak, the formation of cuticular processes on the cphth and the first three free thoracic segments, as well as the structure of the extremities. With a body length of 799 µm, Do. andeep sp. nov. is, however, the largest described representative of the genus Dorsiceratus to date. Rostrum (Fig. 16 A View Figure 16 ) constricted, about 1.6 times longer than broad, cleft at its tip and bearing 2 sensilla and 1 long tube pore.

FR (Fig. 17 A View Figure 17 ) about seven times as long as wide, bearing 7 setae: setae I and II insert on the outer margin halfway along the FR; seta I is tiny and bare, with the bipinnate seta II located right next to it; seta III is bare and inserts subapically on the outer side; seta V is the longest, located apically and flanked externally by seta IV and internally by seta VI, both of which are small and bare; seta VII is biarticulated and arises subapically on the dorsal side of the FR.

A 1 (Fig. 16 B View Figure 16 ) 4 - segmented, segments 1–3 of about equal length, segment 4 only about half as long as the preceding ones. First segment anteriorly with a row of long spinules. All setae bare. Setal formula: I – 1; II – 6; III – 6 + aes; IV – 9 + aes.