H.A.Thomsen, in Thomsen et al. (1988: 429, figs 32-34)
Coccospheres 5–6 μm; central area with an axial cross; BCs 1–1.5 μm long; CFC process c. 2–2.5 μm high, with a short stem supporting 2 large fan-like blades, one smaller than the other. AACs much-reduced symmetrical central processes, without a shaft and smaller distal appendages, sometimes with base-plate calcification of 8 radial bars instead of 4.
Genus description: Coccospheres with up to three types of coccolith: circum-flagellar coccoliths (CFCs); body coccoliths (BCs); and antapical coccoliths (AACs). Outer rim of coccoliths with angular tops forming a serrated margin.
Distribution65º39'S 47º34'W Thomsen et al. (1988)64º49'S 44º41'W Thomsen et al. (1988)
Family Papposphaeraceae description: Diploid phase motile; coccospheres covered in pappoliths. A central process is often prominent. Each pappolith is constructed of a rim of two lath types, one small and confined to the proximal part of the wall, the other vertically expanded; central area with variable structures. Haploid phase motile, with holococcoliths typically with tower-like forms.