Oswaldella terranovae Peña Cantero and Vervoort, 1996: 136–138, figure 1; Peña Cantero et al., 1997: 344; Peña Cantero and Vervoort, 1998: 37; Peña Cantero and García Carrascosa, 1999: 214; Peña Cantero and Marques, 1999: 85.
Oswaldella antarctica: Totton, 1930: 209–210, figure 51.
Remarks. Oswaldella terranovae is characterized by the branched stems, the presence of a much reduced mesial inferior nematotheca in the hydrocladial internodes, the shape of the hydrotheca, and the presence of two axillary nematophores and two ‘mamelons’ on the cauline apophyses (cf. table 1).
Ecology and distribution. Oswaldella terranovae is known only from off Cape Adare, Ross Sea, where it was found at depths of 82–92 m, on a bottom of pebbles (Peña Cantero and Vervoort, 1996).