G.Karst. (Karsten, 1905: 97, pl. 10, fig. 6a–c)
Hendey (1937: 317), Hustedt (1958: 134), Priddle & Fryxell (1985: 86, figs A–D), Priddle et al. (1990: 120, pl. 15.2, fig. 7)
Cells solitary, large, rhombic in girdle view. Valves moderately convex to flat, bearing a stout process displaced to one side; apical axis 110–280 µm. Otaria large, rounded, extending for most of the length of the process (Karsten, 1905). Contiguous area conspicuous. Girdle bands forming 2 dorsiventral columns of segments, with areolae arranged in quincunx (4 at the corners of a square and one at the centre; Hendey, 1937).
Antarctic (Priddle et al., 1990); South Georgia (Hendey, 1937).
Priddle et al. (1990: 115) indicated that this species should be transferred to a genus yet to be described.