''Rhizochromulina'' is an unusual genus of marine

heterokont The stramenopiles, also called heterokonts, are protists distinguished by the presence of stiff tripartite external hairs. In most species, the hairs are attached to flagella, in some they are attached to other areas of the cellular surface, an ...

algae, with one species, ''Rhizocromulina marina''. They are colored amoeboids with a single flagellum, and produce distinctive spindle-shaped zoospores. These have a cell structure typical of the axodines. Before it was studied in detail, ''Rhizochromulina'' was included among the superficially similar golden algae in the order Chrysamoebales, but these produce

zoospore A zoospore is a motile asexual spore that uses a flagellum for locomotion in aqueous or moist environments. Also called a swarm spore, these spores are created by some protists, bacteria, and fungi to propagate themselves. Certain zoospores are ...

s which are similar to flagellate golden algae in form.

References

Ochrophyte genera Dictyochophyceae Monotypic algae genera {{heterokont-stub