Class Protozoa Goldfuss 1820
Parent taxon: Eukaryota according to M. A. Ruggiero et al. 2015
See also Blackwell 2004, Cavalier-Smith 1993 and Scamardella 1999
Sister taxa: Acritarcha, Allonema, Archaeplastida, Birrindudutuba, Changchengia, Chlorobiota, Chromalveolata, Chromista, Conglobocella, Dictyosphaera, Dinophyta, Euglenophyta, Filinexum, Gigantosphaeridium, Glossophyton, Kamolineata, Limbunyasphaera, Palaeosiphonella, Plantae, Protista, Prymnesiophyta, Rhizopodea, Sarcomastigophora, Satka, Siphonoseptum, Spiromorpha, Stramenopila, Tappania, Tuanshanzia, Valeria
Subtaxa: Biciliata Ebriales Entamoebidae Eozoa Perispira Rhizopodea Sarcodina Sarcomastigota