Chaetocirratulus epitocus Blake 2018, new combination

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Cirratulidae; Chaetocirratulus; Chaetocirratulus epitocus; Antarc*; Antarctic; Antarctic Peninsula
• Online Access: https://doi.org/10.5281/zenodo.3798580; http://treatment.plazi.org/id/03A2CB16FFC8A274FF36FE2AFD4CFE0B

Chaetocirratulus epitocus (Monro, 1930), new combination Figures 31–32 Tharyx epitoca Monro, 1930: 157–158, fig. 62; Hartman 1953: 47–48; 1966: 31–32, Plate VIII, fig 4. Not : Tharyx epitoca : Lowry 1975: 9–10, 12; Richardson & Hedgpeth 1977: Table 2; Cantone & Sanfilippo 1992: Table 1; Siciński & Janowska 1993: 161–166; Cantone 1994: 40; Gambi et al. 1997: Table 1; Cantone et al . 2000: 554; Pabis & Siciński 2010: Table 2. Not Aphelochaeta epitoca : Cantone & DiPietro 2001: Table 1; Parapar et al. 2011: 728. Not Aphelochaeta cf. epitoca : Hilbig 2001: 540; Montiel et al. 2005: 197, 2016: Appendix 2 (in part). Material examined. Antarctic Peninsula . Bismarck Strait , R / V Discovery Sta. 190, coll. 24 Mar 1927, 64.933°S, 65.583°W, dredged 93–126 m, stones, mud and rocks, lectotype (BMNH 1930.10.8.2116).— Schollaert Channel , R / V Discovery Sta. 181, coll. 12 Mar 1927, 64.333°S, 63.333°W, Otter trawl, 160–335 m, mud, paralectotype (BMNH 1930.10.8.2089). Description. Both specimens elongate, with thick, robust bodies, weakly fusiform, thickest in middle segments, narrower anteriorly and posteriorly (Fig. 32A). Lectotype complete, 19 mm long, 1 mm wide across anterior setigers, 1.5 mm wide across middle segments, with 50 setigers; paralectotype also complete, but prostomium to end of setiger 2 separated from rest of body; in total measuring 24.5 mm long, with 50 setigers. Body generally cylindrical in cross section; dorsal groove absent; weakly developed mid-ventral line extending along most of body. Individual segments best defined laterally; segmental grooves not crossing dorsum or venter. Pre-setigerous region elongate, narrow, relatively smooth, as long as first four setigers (Figs. 31A, 32 A–C). Prostomium broadly triangular, narrowing to rounded tip; eyespots absent; nuchal organs prominently everted oval mounds in lectotype at posterior lateral margin (Fig. 31A). Peristomium elongate, about as long as first three setigers; dorsally with long smooth anterior section followed by narrow ...