[1] Asexual reproduction occurs via the formation of autospores; two to four are produced per sporangium and these are released through a rupture in the parental cell wall.

Sixteen to 64 sperm cells produced in an antheridium, and are biflagellate, spherical and lack plastids or a stigma.

Egg cells are similar in morphology to autospores; when fertilized, zygotes produced thickened walls.

It is unclear whether it is monophyletic, since phylogenetic studies often find it as a basal evolutionary grade to the rest of Oocystaceae.

[8] Species are distinguished from each other based on details of morphology, namely the size and shape of the cells and their chloroplasts.