Aphelochaeta brandtae Blake 2018, new species

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Cirratulidae; Aphelochaeta; Aphelochaeta brandtae; Antarctic; Antarctic Peninsula; Weddell Sea; Drake Passage; Scotia Sea; South Shetland Islands; Weddell; Coats Land; Antarc*
• Online Access: https://zenodo.org/record/3798616; https://doi.org/10.5281/zenodo.3798616

Aphelochaeta brandtae new species Figures 6–7 Material examined. Weddell Sea, E of Antarctic Peninsula, R / V Polarstern, ANDEEP II (ANT-XIX/4), Sta. PS 61/133-5, 07 Mar 2002, 65°20.27ʹS, 54°12.54ʹW, MUC, 1166 m, holotype (SMF 24954); Sta. PS 61/132-6, 07 Mar 2002, 65°17.77ʹS, 54°0.00ʹW, box corer, 2086 m, 1 paratype (MCZ 1439888).— Weddell Sea, off Coats Land, USCG Glacier, Sta. 69-20, 12 Mar 1969, 73.823°S, 31.682°W, 2288 m (1, USNM 1490706).— Drake Passage, North of South Shetland Islands, R / V Polarstern, ANDEEP I (ANT-XIX/3), Sta. PS61/43-2, 29 Jan 2002, 60°26.95ʹS, 56°4.96ʹW, box corer, 3957 m, 3 paratypes (SMF 249556).— Scotia Sea, R / V Polarstern, ANDEEP I (ANT-XIX/3), Sta. PS61/46-3, 01 Jan 2002, 60°37.92ʹS, 53°57.17ʹW, box corer, 2888 m, 8 paratypes (SMF 24956); Sta. PS61/46-5, 01 Jan 2002, 60°38.13ʹS, 53°57.68ʹW, box corer, 2894 m, 2 paratypes (SMF 24957). Description. A small species, all specimens incomplete; holotype an ovigerous female, mostly complete, 6.4 mm long, 0.4 mm wide across anterior segments, with 39 setigers; paratype from Sta. 46-3, 5.9 mm long, 0.44 mm wide across expanded anterior setigers, with 31 segments. Anterior 7–10 segments narrow, about eight times wider than long (Fig. 6 A–B), then narrowing to 12–20 middle rounded segments about as wide as long, not moniliform (Fig. 7B); last 7–10 segments narrow, elongate. Anterior expanded segments with prominent parapodial shoulders and low rounded dorsum slightly elevated over parapodia (Fig. 6 A–B), without longitudinal groove. Venter weakly rounded, typically without ventral groove, specimen from Glacier Sta. 69-20 (USNM 46797) with narrow ventral groove from middle segments to end of fragment; each anterior segment with broad band of glandular tissue across venter, that stains with MG (Fig. 7 A–B). Holotype with large oblong eggs protruding from body in pairs (Fig. 7 D–E), four per segment; individual eggs approximately 280 x 150 µm. Color in alcohol light tan; no accessory pigment. Prostomium triangular, narrowing to pointed tip ...