Oswaldella grandis Peña Cantero, Svoboda & Vervoort, 1997

Oswaldella grandis Peña Cantero, Svoboda & Vervoort, 1997: 363 –367, figs 7, 14C, D; Peña Cantero & García Carrascosa, 1998: 179; 1999: 212 et seq.; Peña Cantero & Vervoort, 1998: 36; 2004: 833–835, fig. 9; 2009: 86; Peña Cantero & Marques, 1999: 85; Peña Cantero & Ramil, 2006: 953, figs 2D, 3A–C; Peña Cantero, 2008: 457; 2013: 129–130. Oswaldella bifurca — Peña Cantero, 1991: 175, pl. 32; Peña Cantero & García Carrascosa, 1994: 125, fig. 8d–f; 1995: 101–104, fig. 45A–E.

? Oswaldella bifurca — Naumov & Stepanjants, 1962: 98; Stepanjants, 1979: 112, pl. 21 fig. 4; Blanco, 1984: 43, pl. 39 figs 89, 90, pl. 40 figs 91–93, pl. 41 fig. 94.

Ecology. Eurybathic species, found at depths between 20 (Peña Cantero & Vervoort 2009) and 922 m (Peña Cantero & Ramil 2006), on muddy bottoms and on bottoms with small stones (Peña Cantero et al. 1997). Basibiont of other hydroids (Peña Cantero et al. 1997; Peña Cantero 2008). Gonothecae: January (Peña Cantero et al. 1997; Peña Cantero & Vervoort 2004; Peña Cantero & Ramil 2006; Peña Cantero 2008) and February (Peña Cantero et al. 1997; Peña Cantero 2008; Peña Cantero & Vervoort 2009).

Distribution. West Antarctic (Peña Cantero & Vervoort 1998), known from the Weddell Sea (Peña Cantero et al. 1997), off Elephant Island (Peña Cantero & García Carrascosa 1995), Bransfield Strait (Peña Cantero & Ramil 2006), off Deception Island (Peña Cantero & Vervoort 2004; Peña Cantero 2008), off Low Island (Peña Cantero 2013), and off King George Island (Peña Cantero & Vervoort 2009) and off Livingston Island (Peña Cantero 2008), in the South Shetland Islands.