Guillardia theta

Geminigeraceae
Scientific classification
Domain:	Eukaryota
Phylum:	Cryptophyta
Class:	Cryptophyceae
Order:	Pyrenomonadales
Family:	Geminigeraceae B. L. Clay, P. Kugrens & R. E. Lee, 1999
Species
Geminigera cryophila Guillardia theta Hanusia phi Proteomonas pseudobaltica Proteomonas sulcata Teleaulax acuta Teleaulax amphioxeia Teleaulax merimbula

Geminigeraceae is a family of cryptophytes containing the five genera Geminigera, Guillardia, Hanusia, Proteomonas and Teleaulax. They are characterised by chloroplasts containing Cr-phycoerythrin 545, and an inner periplast component (IPC) comprising "a sheet or a sheet and multiple plates if diplomorphic". The nucleomorphs are never in the pyrenoid, and there is never a scalariform furrow. The cells do, however, have a long, keeled rhizostyle with lamellae (wings).

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