The glaucophytes, also known as glaucocystophytes or glaucocystids, are a small group of unicellular algae found in freshwater and moist terrestrial environments, less common today than they were during the Proterozoic. The stated number of species in the group varies from about 14 to 26. Together with the red algae (Rhodophyta) and the green algae plus land plants, they form the Archaeplastida.
AlgaeBase is a global species database of information on all groups of algae, both marine and freshwater, as well as sea-grass.
Eustigmatophytes are a small group of eukaryotic forms of algae that includes marine, freshwater and soil-living species.
The Trebouxiophyceae are a class of green algae, in the division Chlorophyta. Their circumscription within the green algae is not well established due to the need for more genetic studies at higher levels within the group.
Bryopsidales is an order of green algae, in the class Ulvophyceae.
Bolbocoleon is a genus of green algae, in the family Bolbocoleonaceae.
Bryopsidella is a genus of green algae in the family Bryopsidaceae.
Dictyosphaerium is a genus of green algae, in the family Chlorellaceae.
Arabicodium is a genus of green algae in the family Codiaceae.
Pseudopenicillus is a genus of green algae in the family Udoteaceae.
Dicranochaete is a genus of green algae in the order Chaetopeltidales. It is the only genus in the family Dicranochaetaceae.
Pleurococcus is a genus of green algae in the family Chaetophoraceae that are spherical in shape with a thick cell wall to protect themselves against excessive water loss.
Rhexinema is a genus of green algae in the order Ulotrichales. Recent research has suggested that the genus Helicodictyon is a synonym of Rhexinema.
Syncoryne is a genus of green algae, in the family Ulvellaceae.
Trochisciopsis is a genus of green algae, in the family Trebouxiaceae.
Chlorochytrium is a genus of green algae, in the family Chlorochytriaceae.
Palmodictyon is a genus of green algae in the family Radiococcaceae.
Mesostigma is a genus of unicellular biflagellate freshwater green algae, with a single species Mesostigma viride, covered by an outer layer of basket‐like scales instead of a cell wall. As of February 2022, AlgaeBase classified it as the only genus in the family Mesostigmataceae, the only family in the order Mesostigmatales, the only order in the class Mesostigmatophyceae. It is now considered to be one of the earliest diverging members of green plants/algae (Viridiplantae).
Acicularia is a genus of green algae in the family Dasycladaceae.
Filoprotococcus is a genus of green algae in the order Ulotrichales. It was once regarded as a synonym of Trichosarcina. However, it is now accepted as a genus in its own right, and Trichosarcina is considered taxonomically uncertain.
