Kingdom Protista (Haeckel, 1866) - protists Phylum Sarcomastigophora Honigberg & Balamuth, 1963 Subphylum Mastigophora Diesing, 1866 - flagellates Class Zoomastigophorea - "animal-like" flagellates see Phylum Zoomastigina Order Trichomonadida Kirby, 1947 - trichomonads Genus Dientamoeba Jepps & Dobell, 1918 Genus Histomonas Tyzzer, 1920 Genus Trichomonas Donné, 1836