Spio filicornis O. F. Muller 1776

• Main Authors: Bick, Andreas, Bastrop, Ralf
• Format: Other/Unknown Material
• Language: unknown
• Published: 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Spionida; Spionidae; Spio; Spio filicornis; Greenland; Paamiut; Iluilârssuk
• Online Access: https://zenodo.org/record/5697053; https://doi.org/10.5281/zenodo.5697053

Spio filicornis (O. F. Müller, 1776) (Figs 1, 3, 4, 5, 6, 7A, C, 8 A) Nereis filicornis O.F. Müller, 1776: 218. – Fabricius, 1780: 307 –308 Spio filicornis (O.F. Müller, 1776). – Fabricius, 1785: 264 –269, plate V, figs. 8–12. Neotype. West Greenland, Iluilârssuk, near Paamiut (Frederikshaab): 61 ° 50.059 N, 49 ° 25.183 W, 14.06. 2009, eulittoral (ZSRO P- 2059). Non– type material. West Greenland, Iluilârssuk, near Paamiut (Frederikshaab): 61 ° 50.059 N, 49 ° 25.183 W, 14.06. 2009, eulittoral: 16 specimens (ZSRO P- 2048), 1 specimen (ZSRO P- 2056), 1 specimen (ZSRO P- 2057), 1 specimen (ZSRO P- 2058), 5 specimens (ZSRO P- 2060), 1 specimen (ZMH P- 25869), 3 specimens (ZMH P- 25870), 1 specimen (SMF 19520), 3 specimens (SMF 19521); West Greenland, Paamiut: 62 ° 00.709N, 49 ° 41.208 W, 12.06. 2009, eulittoral: 1 specimen (ZSRO P- 2009), 11.06.2009, 3 specimens (ZSRO P- 2044). Diagnosis. Anterior part of prostomium bluntly rounded, posterior part with high, narrow, keel-shaped elevation; anterior part of prostomium and peristomium with dark brown pigmentation; palps with dark brown spots along posterior margin of food groove; nuchal organs with two pairs of more or less straight ciliated bands posterior and posterolateral to prostomium before 2 nd transverse ciliated bands (tcb) on chaetiger 3; branchiae of chaetiger 1 shorter and narrower than those on following chaetigers, absent on last six to ten chaetigers; double-paired metameric dorsal ciliated organs present between tcb of two consecutive segments, starting between tcb of chaetigers 3 and 4, i.e., after second tcb, continuing up to tcb between chaetigers 10 and 11, i.e., up to tenth tcb (rarely up to 11 th tcb on chaetiger 12); neuropodial postchaetal lamellae on median chaetigers narrow but distinctly elongated dorsally; notopodial postchaetal lamellae on posteriormost abranchiate chaetigers elongated lobe-like, distinctly longer than wide. Description. Neotype complete specimen (without palps) with 52 chaetigers, about 15 mm in length and 1.4 mm wide. ...