Pseudoblepharisma is a genus of heterotrich ciliates inhabiting oxygen-depleted freshwater habitats. Most sources report that it contains one species, Pseudoblepharisma tenue, but at least four have been seen in literature.

The ciliate likely prefer an aerobic environment when in the dark, and because it is mixotrophic, it is hypothesized its anoxygenic photosynthesising bacterial endosymbionts