Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818 Class Flagellata see Subphylum Mastigophora Diesing, 1866 Order Diplomonadina see Suborder Diplomonadina Genus [Giardia] Künstler, 1882 Giardia intestinalis