Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818 Class Flagellata see Subphylum Mastigophora Diesing, 1866 Order Euglenoidina Bütschli, 1884 see Order Euglenida Bütschli, 1884 Family Euglenidae Stein, 1878 Genus [Euglena] C.G. Ehrenberg, 1830 Euglena gracilis Klebs, 1883