E.Takah. (Takahashi, 1987: 161, figs 8 (type), 9)
Vørs (1992: 66, fig. 31a–c, e)
Cells spherical to ovoid, 6–6.5 µm diameter, biflagellate. Flagella unequal. Cell body covered with 1 type of scale, consisting of a basal plate with a central spine; basal plate circular, 0.47-0.8 µm diameter, ornamentated with 2-4 concentric rings of perforations, with or without a slightly thickened rim; spine slightly tapering, 0.5-0.9 µm long, with or without a swollen basal part.
Type locality, fast-ice around East Ongul I., East Antarctica (Takahashi, 1987); Gulf of Finland (Vørs, 1992); Arctic Canada (Vørs, 1993a).
Details of body scale ornamentation and a comparison with the closely allied Northern Hemisphere species P. foraminifera I.A.N.Lucas and P. circumforaminifera Wujek were provided by Takahashi (1987).