Bradabyssa alaskensis Salazar-Vallejo 2017, n. sp.

• Main Author: Salazar-Vallejo, Sergio I.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Flabelligeridae; Bradabyssa; Bradabyssa alaskensis; Arctic Ocean; Barrow; Point Barrow; Alaska; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.6051143; http://treatment.plazi.org/id/038B87B6347AFFB11AB7FC5FFB43F938

Bradabyssa alaskensis n. sp. Figure 12 Type material. Arctic Ocean, Northern Alaska. Holotype (LACM 2598) and two paratypes (LACM 2599), Aleutian Islands Cruise, Sta. 109 (71º34' N, 162º53' W), 140 km NNW off Icy Cape (250 km W off Point Barrow), 42 m, silty clay sediment, 19 Aug. 1949. Description . Body pale, cylindrical, blunt anteriorly and posteriorly, anterior end slightly everted (Fig. 12A, B); 36 mm long, 3 mm wide, cephalic cage 1.5 mm long, 29 chaetigers. Body papillae barely covered with fine sediment particles, forming triangular or tapered tiny lobes. Papillae short, longer than wide, tapered, slightly capitate, sometimes eroded in intersegmental areas, in 16–18 transverse series per segment in anterior chaetigers (chaetiger 10). Anterior end observed by dissection of one paratype. Cephalic hood short, margin smooth. Prostomium low dark cone, eyes not seen. Caruncle reaching branchial plate margin, dark, lateral ridges darker, median keel pale. Palps thick, contracted, about as long as branchiae; palp lobes low, dark. Lateral lips darker, projected, dorsal and ventral lips reduced. Branchiae cirriform, sessile on branchial plate, in two lateral groups, about 30 filaments per lateral group (Fig. 12C), slightly shorter than palps. Nephridial lobes not seen. Cephalic cage chaetae as long as 1/24 body length or 1/2 body width. Only chaetiger 1 involved in cephalic cage; chaetae arranged in short lateral series, each with 2–3 chaetae. Anterior margin of first chaetiger papillated, papillae short, abundant. Anterior chaetigers without especially long papillae. Chaetigers 1–3 becoming slightly longer. Chaetal transition from cephalic cage to body chaetae abrupt; aristate neurospines present from chaetiger 2. Gonopodial lobes in chaetiger 5, dark, cylindrical (Fig. 12D, E). Parapodia well developed, lateral. Median neuropodia ventrolateral. Notopodia and neuropodia close to each other. Notopodia with chaetal lobe short, rounded, with two anterior and two posterior digitate papillae, about 1/3 as long as ...