Amphicteis wesenbergae Parapar & Helgason & Jirkov & Moreira 2011, sp. nov.

• Main Authors: Parapar, Julio, Helgason, Gudmundur V., Jirkov, Igor, Moreira, Juan
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Ampharetidae; Amphicteis; Amphicteis wesenbergae; East Greenland; Greenland; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.10536979; http://treatment.plazi.org/id/03AE87C3A200B857FDC70B33F737FA29

Amphicteis wesenbergae sp. nov. (Figures 1, 9, 10) Type material Holotype. Zoologisk Museum: ZMUC-POL-1871. “Ingolf” Expedition station 117, east Norwegian Sea (69 ◦ 13 ′ N; 08 ◦ 23 ′ W), 1889 m depth. The specimen was formerly identified as A. gunneri . Paratypes. Icelandic Museum of Natural History (Reykjavik): IMNH 24085 (BIOICE sample 2018; 15 paratypes); IMNH 24086 (2704; three paratypes); IMNH 24087 (2776; 15 paratypes); IMNH 24088 (2777; one paratype); IMNH 24089 (2844; three paratypes); IMNH 24090 (2863; one paratype); IMNH 24091 (2903; one paratype); IMNH 24092 (3210; one paratype); IMNH 24093 (3519; one paratype); IMNH 24094 (3595; one paratype); IMNH 24095 (3628; three paratypes); IMNH 24096 (3629; 10 paratypes); IMNH 24097 (3636; one paratype); IMNH 24098 (3657; 28 paratypes). Additional BIOICE material Museo Nacional de Ciencias Naturales (Madrid): MNCN 16.01 /13264 (BIOICE sample 3222; 235 specimens). Zoologisk Museum (Copenhagen): ZMUC-POL-2147 (BIOICE sample 3624; 10 specimens). Other material examined East Greenland: R/ V Sevastopol , cruise 10, station 1725 (67 ◦ 32 ′ N; 13 ◦ 15 ′ W), 1730 m, − 0.89 ◦ C (one specimen). R/ V Sevastopol , cruise 15, station 2448 (69 ◦ 20 ′ N; 12 ◦ 00 ′ W), 1940 m, −0.9 ◦ C (one). R/ V Tunetz , cruise 105, station 16 (72 ◦ 50 ′ N; 14 ◦ 00 ′ W), 960 m, −0.96 ◦ C (one). West Norway: R/ V Tunetz , cruise 105, station 6 (68 ◦ 00 ′ N; 10 ◦ 00 ′ W), 260 m, 6.06 ◦ C (one). Description based on holotype Holotype 9 mm long and 1 mm wide at thorax level. Additional material 7–12 mm long and 0.8–2 mm wide. Thorax and abdomen well defined; thorax about 1.5 times the width and length of abdomen (Figure 9A); barely tapering towards posterior part. Prostomium of Amphicteis -type (Figure 10A) with a pair of dorsal longitudinal ridges, less obvious than in A. gunneri , and a pair of well-marked transverse nuchal grooves. No eyes seen. Four pairs of long, tapering and deciduous branchiae (all missing in holotype) separated in left and right groups and arranged in two pairs, the ...