Microthamniaceae

Microthamniaceae is a family of green algae in the class Trebouxiophyceae.^[2] It is the only family in the order Microthamniales.

Microthamniaceae
Microthamnion sp.
Scientific classification
Kingdom:	Plantae
Division:	Chlorophyta
Class:	Trebouxiophyceae
Order:	Microthamniales M.Melkonian
Family:	Microthamniaceae G.S.West
Genera[1]
Coleochlamys Microthamnion

Currently, there are two accepted genera within the family, Coleochlamys and Microthamnion.^[1] The two genera are sister to each other in molecular phylogenetic analyses, but share little in common morphologically.^[3] Microthamnion consists of branched filaments of cells, and is common worldwide in freshwater habitats. Meanwhile, Coleochlamys is an uncommon genus consisting of irregularly club-shaped cells, and is an uncommon, cold-tolerant alga of freshwater or terrestrial habitats.^[4]