Raphidocelis

Raphidocelis is a genus of green algae in the family Selenastraceae. They are found in freshwater habitats.

One species, Raphidocelis subcapitata, is a common model organism in the field of toxicology, where it is used as a bioassay. It was previously known as Selenastrum capricornutum, a name later shown to be incorrect.