Oswaldella gracilis Peña Cantero, Svoboda & Vervoort, 1997: 361 –363, figs 6, 14 B; Peña Cantero & García Carrascosa, 1998: 179; 1999: 214; Peña Cantero & Vervoort, 1998: 36; 2004: 833; Peña Cantero & Marques, 1999: 85.
Ecology. Shelf species, found at a depth of 440 m (Peña Cantero et al. 1997).
Distribution. Hitherto, considered endemic to the Weddell Sea (Peña Cantero et al. 1997).