Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973 Class Spirotrichonymphea Grassé, 1952 see Order Spirotrichonymphida Grassé, 1952 Order Spirotrichonymphida Grassé, 1952 Family Holomastigotoididae Copeland, 1956 Genus Micromastigotes Hollande & Carruette-Valentin, 1971