They have been reported from over 3200 species of lizard but only 29 species of snake.

Three species - P. pessoai, P. tomodoni and P. wenyoni - infect snakes.

These species belong to the subgenera Asiamoeba, Carinamoeba, Fallisia, Garnia, Lacertamoeba, Ophidiella, Paraplasmodium and Sauramoeba.

[1] Additional species continue to be described.

Compared with those known for the species infecting humans, few vectors are known for these species.