Oswaldella incognita Peña Cantero, Svoboda & Vervoort, 1997: 367 –369, fig. 8; Peña Cantero & Vervoort, 1998: 36; 2004: 837–839, fig. 11; 2009: 86; Peña Cantero & García Carrascosa, 1999: 212 et seq.; Peña Cantero & Marques, 1999: 85; Peña Cantero, 2006: 938, fig. 3 E; 2008: 457; 2009: 1748, fig. 3 a; 2013: 130; Peña Cantero et al., 2010: 41–57. Oswaldella antarctica — Peña Cantero, 1991: 168, pls 31, 56, pl. 68 fig. a; Peña Cantero & García Carrascosa, 1994: 125, fig. 8 a–c; 1995: 96–101, figs 43 A–E, 44 A–F, 64 E.
Ecology. Eurybathic species, found at depths between 20 (Peña Cantero & Vervoort 2009) and 952 m (Peña Cantero & Vervoort 2004). Epilithic on gravel (Peña Cantero 2008). Basibiont of Lafoea dumosa (Peña Cantero 2006). Gonothecae: January (Peña Cantero & García Carrascosa 1995; Peña Cantero & Vervoort 2004; Peña Cantero 2013) and February (Peña Cantero & Vervoort 2004, 2009; Peña Cantero 2013).
Distribution. Circum-Antarctic (Peña Cantero 2009), though mainly known from West Antarctica. East Antarctica: the Balleny Islands (Peña Cantero 2009). West Antarctica: the South Shetland Islands (Peña Cantero & García Carrascosa 1995; Peña Cantero et al. 1997; Peña Cantero & Vervoort 2004; 2009; Peña Cantero 2006, 2008), the South Orkney Islands and Palmer Archipelago (Peña Cantero & Vervoort 2004), off Deception Island (Peña Cantero & Vervoort 2004; Peña Cantero 2008), Low Island (Peña Cantero & Vervoort 2004; Peña Cantero 2013) and off Bransfield Island, in the Antarctic Peninsula (Peña Cantero & Vervoort 2008).