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 Protopalina Doflein, 1929 see Genus Protoopalina Metcalf, 1918