Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818 Class Flagellata see Subphylum Mastigophora Diesing, 1866 Order Opalinina see Order Opalinida Poche, 1913 Genus Zelleriella Metcalf, 1920, nom. nud.