Description of Pteridomonas:
Cells very similar to Actinomonas, but tentacles are mainly confined to an anterior ring around the flagellum, and the cells are usually attached to a substratum. They also differs in the presence of a very reduced flagellar wing and paraxonemal rod and in the presence of two ring-like structures below the transverse septum of the flagellar transition region. Such rings are also present in Apedinella but not in any other pedinellid. Heterotrophic, feeding on bacteria and on other protists. Three species in marine, freshwater and brackish environments.