Nannotax Enabling nannofossil research

Description: Small form, coccoliths 3-6μm; strongly asymmetric; proximal shield much smaller than distal, with sutures complexly kinked becoming pseudo-bicyclic; usually with deep, narrow depression on distal surface.

Remarks:

Synonym: O. fragilis var. cavum (Okada & McIntyre 1977) Jordan & Young 1990 [O. fragilis ssp. cavum] - see Kleijne (1993) for discussion, although our observations indicate wider size range for th species.

Range: Pliocene to Recent.