Trebouxiophyceae

The Trebouxiophyceae, also known as trebouxiophytes, are a class of green algae, in the division Chlorophyta. Members of this class are single-celled, colonial, or multicellular and are found in freshwater, terrestrial or marine habitats worldwide. Many taxa in the Trebouxiophyceae form symbiotic relationships with other organisms; in particular, the majority of phycobionts within lichens are trebouxiophytes. A number of taxa have also lost the ability to photosynthesize, and have evolved to become parasitic; examples include Prototheca and Helicosporidium.

Coccomyxaceae is a family of algae, in the class Trebouxiophyceae.

Dictyosphaeriaceae is a family of green algae. , AlgaeBase places two genera in the family: Dactylosphaerium Steinecke Dimorphococcopsis C.-C.Jao However, AlgaeBase does not include the type genus Dictyosphaeria in the family.

Micractiniaceae is a family of green algae in the class Trebouxiophyceae. , AlgaeBase placed only the genus Phythelios in this family, and not the type genus Micractinium.

Choricystis is a genus of green algae in the class Trebouxiophyceae, considered a characteristic picophytoplankton in freshwater ecosystems. Choricystis, especially the type species '', has been proposed as an effective source of fatty acids for biofuels. Choricystis algacultures have been shown to survive on wastewater. In particular, Choricystis'' has been proposed as a biological water treatment system for industrial waste produced by the processing of dairy goods.

Leptosira is a genus of green algae, in the class Trebouxiophyceae. It is epiphytic on aqutic plants, and is found in freshwater habitats or in soil.