Nannotax Enabling nannofossil research

Description: Coccoliths with structure similar to those of Emiliania and Reticulofenestra (see  Young 1989 for discussion), but with conjunct bridge, formed from inner tube-elements spanning central area; shields usually solid, i.e. without slits between the elements.

Species included: Gephyrocapsa taxonomy is notoriously confused but the following taxa are a useful starting set

	G. oceanica
	G. muellerae
	G. caribbeanica
	G. omega
	G. lumina
	small Gephyrocapsa

Key references: Samtleben (1980), Matsuoka & Okada (1990), Bollmann (1997).

Life-cycle: Diploid phase non-motile producing heterococcoliths. Haploid phase motile, non-calcifying.

Type Species: Gephyrocapsa oceanica Kamptner 1943