Orbiniella andeepia Narayanaswamy & Blake 2005

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Orbiniidae; Orbiniella; Orbiniella andeepia; Drake Passage; Noto; Weddell; Weddell Sea
• Online Access: https://zenodo.org/record/4901835; https://doi.org/10.5281/zenodo.4901835

Orbiniella andeepia Narayanaswamy & Blake, 2005 Figure 57 Orbiniella andeepia Narayanaswamy & Blake, 2005: 843 –846, fig. 1. Material examined.—Drake Passage, ANDEEP I ANT XIX-3, R/V Polarstern, Sta. PS-61/114-7, 2900 m (1, JAB).—Weddell Sea, ANDEEP II ANT XIX-4, R/V Polarstern, Sta. PS-61/139- 10, 3965 m (1, ZMH P-27801); PS-61/141- 7, 2260 m (1, ZMH P-27802); ANDEEP III ANT XXII-3, R/V Polarstern, Sta. PS-67/110-4, 4700 m (1, SEM, JAB); Sta. PS-67/110- 5, 4702 m (1, ZMH P-27803); Sta. PS-67/121- 10, 2663 m (1, ZMH P-27804); Weddell Sea, abyssal plain, ANDEEP SYSTCO ANT XXIV-2, R/V Polarstern, Sta. 33- 14, 5338 m (1, ZMH P- 27805). Description. A large specimen from ANDEEP III Station PS-67, 11– 12 mm long, 0.6 mm wide for 68 normal setigerous segments and four setigers as part of a narrow regenerating posterior pygidial end. Morphology of prostomium and peristomium same as originally reported for smaller specimens. Prostomium broadly rounded anteriorly (Fig. 57 A), exhibiting methyl green staining reaction; peristomium with two achaetous rings (Fig. 57 A). Eyespots absent; two pigmented nuchal organs present. First 12 setigers narrower than following ones suggesting a weak differentiation of body into thoracic and abdominal regions. Each setigerous segment with prominent encircling glandular ridge or ring encompassing dorsum, venter, and parapodia; this ring occupying most of surface of narrower anterior segments, then restricted to posterior one-third of longer abdominal segments; glandular ring with a weak methyl green staining reaction. Each notopodium with a short post-setal lamella (Fig. 57 C), smaller than originally reported, but proportional in size on larger specimens; neuropodial lamellae absent. Setae including crenulated capillaries in both noto- and neuropodia (Fig 57 B); 1–2 spines occurring in notopodia and neuropodia; spines smooth and pointed (Fig. 57 C). Branchiae absent. Narrow posterior end appears to be regenerating; anal cirri absent. Remarks. The larger specimens found at Sta. PS ...