(fig. 15A–D, table 23)
Sertularia polyzonias Linnaeus, 1758: 813.
Sertularella polyzonias: Hincks, 1868: 235, pl. 46 fig. 1; Nutting, 1904: 90, pl. 21 figs 1–2; Hartlaub, 1905: 655, figs T 4 –U 4; Stechow, 1919: 89; Fraser, 1944: 268, pl. 58 fig. 258; Picard, 1951: 347; Naumov & Stepanjants, 1962: 87; Naumov, 1969: 363, fig. 226; Rees & Rowe, 1969: 18; Calder, 1970: 1528, pl. 6 figs 3–5; Leloup, 1974: 32, fig. 26; Calder, 1975: 307, fig. 5C; Millard, 1975: 299; Ramil et al., 1992: 500, figs 1B, 4, 5; Ramil & Vervoort, 1992: 225, fig. 63A–B; Cornelius, 1995b: 74, fig. 17; El Beshbeeshy, 1991: 179, fig. 45; Hirohito, 1995 (English text): 199, fig. 65D; Calder, 1997: 88; Medel & Vervoort, 1998: 47, fig. 13; Schuchert, 2001a: 100, fig. 84; Peña Cantero & García Carrascosa, 2002: 134, fig. 25F–H; Bouillon et al., 2004: 182, fig. 100E–I; Vervoort, 2006: 268.
Sertularella gayi: García-Corrales et al., 1980: 33, fig. 11.
Material examined. Stn. COM 03 —25.ii.2005, 15– 25 m, S69: several fertile colonies and fragments, up to 5.5 cm high, on polychaete tube, 3 slides (MHNG INVE 53256). Stn. COM 06 —26.i.2006, 20– 23 m, S95: several sterile stems, 4–5 cm high, on wood (MHNG INVE 53344). Stn. COM 07 —25.xii. 2004, 22 m, S47: four sterile fragments, 2.5–5.5 cm high, 1 slide (MHNG INVE 53220). Stn. COM 11 —11.ix. 2004, 26 m, S14: one colony and a fragment, 8 and 5.5 cm high, respectively, both with many gonothecae, and additional smaller, sterile fragments, on rock (MHNG INVE 53167); 27.i.2006, 17– 23 m, S97: several sterile fragments, up to 1.8 cm high. Stn. CFA — 14.iii.2006, 10– 30 m, S88: several fertile fragments, 3–4 cm high (MHNG INVE 53325).
Type locality. Likely unknown.
Remarks. This well-known species needs no additional comment. For recent redescriptions see Ramil & Vervoort (1992) and Cornelius (1995b).
Hydroid epibionts. Bougainvillia pyramidata (Forbes & Goodsir, 1851); Eudendrium cf. scotti Puce, Cerrano & Bavestrello, 2002; Filellum serratum (Clarke, 1879); Hebella striata Allman, 1888; Halecium sp.; Obelia dichotoma (Linnaeus, 1758).
World distribution. This is a cosmopolitan species (Medel & Vervoort 1998).
Records from Chile. Previous records of S. polyzonias are from the Canal Trinidad, Punta Arenas, Strait of Magellan, Juan Fernández (Hartlaub 1905), Seno Reloncavi and Golfo de Ancud (Leloup 1974). The present material was collected between 42°10' S and 49°11' S.