Genus Sappinia Dangeard, 1896
Diagnosis: Locomotive form resembles a smooth Thecamoeba, some 63 µm in length. Tendency for cells to have 1 to 4 pairs of nuclei. Mature cysts uninucleate or binucleate; life cycle of this amoeba thought to involve sexual processes in the cyst phase. One species reportedly has stalked cysts or resting stages.
At the ultrastructural level, surface coat as a thick glycocalyx.
Type species: Sappinia pedata Dangeard, 1896
Ecology: Widely distributed in freshwater, soil, and manure.