[2] It is closely related to the model green algae, Chlamydomonas, and traditionally has been distinguished mainly through the absence of a pyrenoid.

[3] Species of Chloromonas occupy a variety of habitats, including soil, temporary pools of fresh water and eutrophic lakes.

[4] Chloromonas is a unicellular organism with cells that are ranging from spherical, ovoid, cylindrical, or spindle-shaped.

[1] Traditionally, the genus Chloromonas has been defined morphologically as being a pyrenoid-less version of Chlamydomonas.

In 2001, as a first step towards revising the genus, Thomas Pröschold and colleagues emended the circumscription of Chloromonas to include all species of this clade.