Geminigeraceae

Geminigeraceae is a family of cryptophytes containing the five genera Geminigera, Guillardia, Hanusia, Proteomonas and Teleaulax.^[1] 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).^[1]

Geminigeraceae
Guillardia theta. DAPI-staining images showing the representative cells of cell cycle stages based on the localization of the nucleus and the shape of the chloroplast. DIC, images of differential interference contact; Chl, chloroplast autofluorescence; Chl/DAPI, merged images of Chl and DAPI. The double arrowhead indicates constriction of the chloroplast division site. Scale bar = 5 µm
Scientific classification
Domain:	Eukaryota
Clade:	Pancryptista
Phylum:	Cryptista
Class:	Cryptophyceae
Order:	Pyrenomonadales
Family:	Geminigeraceae B. L. Clay, P. Kugrens & R. E. Lee, 1999
Genera
Geminigera Guillardia Hanusia Plagioselmis Teleaulax