Pseudodidymocystis is a genus of green algae in the family Scenedesmaceae.

[2] Pseudodidymocystis consists of single cells or two-celled colonies.

When in colonies, the two cells are typically oval to ellipsoidal in shape, whereas single cells are nearly spherical.

The cell wall has two layers: a fibrous inner layer and an outer layer of sporopollenin which is often granulated.

This Chlorophyceae-related article is a stub.