Genus Pseudothecamoeba Page, 1976

Diagnosis: amoeba a much flattened cylinder, monopodial or branching, usually with an anterior hyaline cap; length-breadth ratio often 4 or more; surface folds and wrinkles often present; uninucleate, with granular nucleus in known species; surface coat of discrete filaments radiating outward from plasma membrane; no crystals.

Type species: Pseudothecamoeba proteoides (Page, 1976)