Amphicteis ninonae Jirkov 1985

• 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 ninonae; Iceland; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.10536977; http://treatment.plazi.org/id/03AE87C3A219B84EFE7E0C94F425FB68

Amphicteis ninonae Jirkov, 1985 (Figures 4D–F, 5) Amphicteis ninonae : Jirkov, 1985: 1894–1897 (textfigure); Jirkov, 2001: 472–473 (textfigure). Amphicteis gunneri : Augener, 1928: 779 (partim?); Annenkova, 1929: 497, fig. 47 (partim); Ditlevsen, 1937: 39–40 (partim?) - non Sars, 1935. Material examined BIOICE sample 2014 (four specimens); 2045 (one); 2046 (two); 2057 (one); 2070 (eight); 2085 (six); 2089 (one); 2094 (one); 2110 (one); 2113 (one); 2129 (three); 2145 (three); 2167 (one); 2174 (two); 2315 (one); 2319 (one); 2328 (eleven); 2359 (one); 2372 (one); 2572 (one); 2575 (three); 2576 (three); 2592 (one); 2594 (three); 2603 (two); 2604 (one); 2606 (four); 2610 (one); 2613 (one); 2619 (three); 2626 (one); 2627 (six); 2666 (four); 2673 (two); 2683 (one); 2792 (two); 2901 (one); 3099 (one); 3115 (one); 3252 (four); 3638 (five). Occurrence In all, 101 specimens of A. ninonae (5.65% of the total) were collected in 40 BIOICE samples. In contrast to A. gunneri , this species seems to be restricted to the north and east coasts of Iceland. Depth range: 134–2067 m; temperature range: −0.8 to 7.57 ◦ C. Reported distribution Norwegian Sea, Arctic Seas (Hansson 1998; Deubel 2000). Our findings confirm the presence of this species in Icelandic waters, which was previously reported by Jirkov (2001). Remarks Amphicteis ninonae has often been confused with A. gunneri and to some extent perhaps also with A. midas . Nevertheless the low boreal distribution proposed for A. midas (see Hartley, 1985:311) against the high-latitude distribution of A. ninonae (see above), makes it difficult to believe that both species occur in sympatry. Following Jirkov (1985:1896; 2001:472), Amphicteis ninonae is primarily characterized by the colour (dark brown), and number (8–16) and shape (blunt tips) of paleae (Figure 4D, E and key below). We agree with Jirkov (1989:111) that A. ninonae has abdominal rudimentary notopodia. The BIOICE specimens are usually larger than those of A. gunneri and the number of paleae seems to have a weaker ...