Kingdom Protista (Haeckel, 1866) - protists Phylum Sarcomastigophora Honigberg & Balamuth, 1963 Subphylum Mastigophora Diesing, 1866 - flagellates Class Zoomastigophorea - "animal-like" flagellates see Phylum Zoomastigina Order Diplomonadida Wenyon, 1926 - diplomonads Genus Enteromonas da Fonseca, 1915 Genus Giardia Künstler, 1882 Genus Trepomonas Dujardin, 1841