Ammotrypanella princessa Schüller, 2008, sp. nov.

• Main Author: Schüller, Myriam
• Format: Other/Unknown Material
• Language: unknown
• Published: 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Opheliidae; Ammotrypanella; Ammotrypanella princessa; Antarctic; Antarctic Peninsula; Weddell Sea; Scotia Sea; Weddell; Elephant Island; Antarc*
• Online Access: https://zenodo.org/record/5615906; https://doi.org/10.5281/zenodo.5615906

Ammotrypanella princessa sp. nov. (Fig. 3 F–G) Holotype. ANDEEP I – II, Weddell Sea, Antarctic Peninsula, Sta. 134 - 4, 0 9 March 2002, 65° 19.20 ’S, 48 ° 3.81 ’W, 4066–4069 m, EBS, ZMH P- 24755. Paratypes. Scotia Sea northeast off Elephant Island, Sta. 42 -2, 27 January 2002, 59° 40.29 ’S, 57 ° 35.43 ’W, 3683–3690 m, EBS, 1 specimen, Weddell Sea, Antarctic Peninsula, Sta. 135 -4, 11 March 2002, 65° 0.06 ’S, 43 ° 1.19 ’W, 4678 m, EBS, 1 specimen, ZMH P- 24756. Additional material. 16 - 10 (1), 78 - 9 (1), 81 - 8 (1), 121 - 11 (1), 153 - 7 (1). Etymology. The name refers to the crown-shaped prostomium and the long, slightly bent chaetae along the anterior and median body that give the species a noble, feminine look. Diagnosis. Distinguishing characters of the species are the shape of the prostomium, the presence of relatively long chaetae in the median body region, and the smooth margin of the anal tube in combination with the presence of a ventral cirrus. Description. Holotype complete, body long and thin, 11 mm long and 1 mm wide for 35 chaetigers. Length of species 5–11 mm, width about 0.2–1 mm; number of chaetigers 33–35. With ventral groove along whole length of body. Posterior body region laterally flattened. Color in alcohol white to a light tan. Prostomium crown-shaped to conical, with a short palpode. Peristomium limited to the lips. First following segment achaetous. Nuchal organs apparent as lateral grooves, eyes absent (Fig. 3 G). Anterior eight parapodia button-shaped with prolonged, stiff chaetae in bushy fascicles. Median parapodia less distinct, embedded in lateral groove, with few long, slightly bent chaetae. Posterior parapodia prominent, chaetae long and straight. All chaetae simple. Branchiae present in varying numbers in third quarter of body (about chaetigers 23–30), all of similar length, flat with wide base, tapering to top. Posterior abranchiate chaetigers reduced in length, close to each other. Pygidium with anal tube; about as long as last six chaetigers, opening slightly ventrally; ...