Therochaeta flabellata

• Main Author: Salazar-Vallejo, Sergio I.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Flabelligeridae; Therochaeta; Therochaeta flabellata; Arctic Ocean; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.7191300; http://treatment.plazi.org/id/03985007F251FFEC00D8FA14FBAD4D94

Therochaeta flabellata (Sars in Sars, 1872) (Fig. 4) Trophonia flabellata Sars, 1869: 253 (species list, nomen nudum ); Sars in Sars 1872: 409; 1873: 249-252, pl. 17, figs 1-12. Stylarioides flabellata – McIntosh 1915: 100-102, pl. 94, fig. 1, pl. 96, fig. 4, pl. 104, figs 3-3e. — Fauvel 1927: 117, figs 41h-m. Pherusa flabellata – StØp-Bowitz 1948a: 18 -20, fig. 3; 1948b: 36. — Hartmann-Schröder 1971: 372; 1996: 420, fig. 204. — Gillandt 1979: 57, fig. 21. — Jirkov & Filippova 2001: 362, figs 1-4 Therochaeta flabellata – Fauchald 1972: 416 (n. comb.). — Castelli 1990: 15 MATERIAL EXAMINED. — Northeastern Atlantic Ocean. Six specimens (ZMUB 18602), damaged, Osterfjord, Norway, 20.I.1930 (10-13.5 mm long, 1.5-2.0 mm wide, cephalic cage 1.2-2, 16-21 chaetigers; ova 125 µm). Four specimens (ZMUB 2285), damaged, only one complete, Hardangerfjord, Norway, Danielsen coll. (complete 12 mm long, 2 mm wide, cephalic cage 4 mm long, 20 chaetigers). Two specimens (ZMUB 41770), both with anterior end everted, Bergensfjord Strait, Norway, 17.III.1924, AppellØf coll. Two specimens (ZMUB 41771), R/V Michael Sars 1906 Expedition, Stat. 300, 7.VII.1906 (9.0- 10.5 mm long, 1.8 mm wide, cephalic cage 5.5 mm long, 17-18 chaetigers). Three specimens (LACM-AHF), Hardangerfjorden, Stat. 13-52, 144- 133 m, 23.IX.1958, K. Fauchald coll. (12.0- 21.5 mm long, 1.3-2.5 mm wide, cephalic cage 6 mm long, 19-30 chaetigers). One specimen (HDMSU unnumb.), R/V Sevastopol , Stat. 5.1092, 250 m, 12.VII.1957 (10 mm long, 1 mm wide, cephalic cage 5 mm long, 20 chaetigers; pseudocompound hooks in chaetigers 3-8). DISTRIBUTION. — Northeastern Atlantic Ocean, Norwegian Sea, Arctic Ocean. DESCRIPTION Better specimens (ZMUB 41770) with body cylindrical, tapered posteriorly, with marked constrictions in chaetiger 2 and in some posterior chaetigers, looking beaded. Body completely covered by fine sediment grains, mostly whitish or grayish, with some black particles (Fig. 4A); 13.5-16 mm long, 1.5-2.0 mm wide, cephalic cage 3.5 (broken) – 5.0 mm long, ...