SEM study of species of Oswaldella Stechow, 1919 (Cnidaria, Hydrozoa, Kirchenpaueriidae), with an annotated checklist of the species of the genus Author Molinero, A. González Author Peña Cantero, A. L. text Zootaxa 2015 4052 4 401 441 journal article 10.11646/zootaxa.4052.4.1 93f6d085-8e63-4d1e-89c1-f950128b2a61 1175-5326 245887 47EF6E9D-9064-4899-B3DD-276FF7C969EB Oswaldella antarctica ( Jäderholm, 1904 ) Schizotricha antarctica p.p. Jäderholm, 1904 : 12 ; 1905: 35, pl. 14 figs 6–8. Not Schizotricha antarctica — Vanhöffen, 1910 : 336 , fig. 48 (= Oswaldella rigida Peña Cantero, Svoboda & Vervoort, 1997 ). Oswaldella antarctica — Stechow, 1919 : 853 ; 1920: 40(32); Peña Cantero & Vervoort, 1995: 330–333, fig. 1; 1998: 36; 2004: 812–816; Peña Cantero et al ., 1997: 344; Peña Cantero & García Carrascosa, 1998 : 178 ; 1999: 214; Peña Cantero & Marques, 1999 : 85 . ? Polyplumaria antarctica — Jäderholm, 1926 : 6 . Not Polyplumaria antarctica — Billard, 1914 : 28 –31, fig. 17 (= Oswaldella erratum Peña Cantero & Vervoort, 1997 ). Not Oswaldella antarctica — Totton, 1930 : 209–210, fig. 51 (= Oswaldella terranovae Peña Cantero & Vervoort, 1996 ); Blanco, 1984 : 41, pl. 38 figs 86–88 (= Oswaldella blanconae El Beshbeeshy, 1991 ); Broch, 1948 : 13–16, fig. 4a; Stepanjants, 1979 : 112, pl. 21 fig. 5a, b (= Oswaldella stepanjantsae El Beshbeeshy, 1991 ); Naumov & Stepanjants, 1972 : 52, fig. 14a, b (= partly Oswaldella stepanjantsae El Beshbeeshy, 1991 , partly another species of Oswaldella ); Peña Cantero, 1991 : 168, pls 31, 56, pl. 68 fig. a; Peña Cantero & García Carrascosa, 1994 : 125–126, fig. 8a–c; 1995: 96–101, figs 43A–E, 44A–F, 64E (= Oswaldella incognita Peña Cantero, Svoboda & Vervoort, 1997 ) Ecology and distribution. Known only from off Seymour Island (Graham Land); collected at 150 m depth ( Jäderholm 1904 ; Peña Cantero & Vervoort 1995).