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 bifurca Hartlaub, 1904 Schizotricha bifurca Hartlaub, 1904 : 16 , pl. 3 fig. 4–8. Oswaldella bifurca — Stechow, 1919 : 852 ; 1920: 40 (32); Peña Cantero et al ., 1997: 345–349, figs 1, 13a; Peña Cantero & García Carrascosa, 1998 : 179 ; 1999: 214; Peña Cantero & Vervoort, 1998 : 36 ; 2004: 816–818, fig. 1; Peña Cantero & Marques, 1999 : 85 ; Peña Cantero, 2012 : 858 . Not 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. Not Oswaldella bifurca — Totton, 1930 : 208, fig. 50 (= Oswaldella tottoni Peña Cantero & Vervoort, 1996 ); Peña Cantero, 1991 : 175–179, pl. 32; Peña Cantero & García Carrascosa, 1994 : 125–126, fig. 8d–f; 1995: 101–104, fig. 45A–E (= Oswaldella grandis Peña Cantero, Svoboda & Vervoort, 1997 ); Millard, 1977 : 40, fig. 12a–c (=? Ventromma sp.). Ecology. Deep-water species, found at depths from 342 to 1610 m ( Peña Cantero & Vervoort 2004 ). Gonothecae : November ( Hartlaub 1904 ), January ( Peña Cantero & Vervoort 2004 ) and February (Peña Cantero et al . 1997; Peña Cantero & Vervoort 2004 ). Basibiont of other hydroids ( Peña Cantero & Vervoort 2004 ). Distribution. Circum-Antarctic ( Peña Cantero & Vervoort 2004 ). West Antarctica : the Bellingshausen Sea ( Hartlaub 1904 ) and the Weddell Sea (Peña Cantero et al . 1997). East Antarctica : the Balleny Islands, the Ross Sea, and off Victoria Land ( Peña Cantero & Vervoort 2004 ).