Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818 Class Ciliata see [unranked] ciliates Order Holotricha Suborder Hymenostomata Genus Paramaecium Müller, 1773 see Genus Paramecium Müller, 1773 Paramaecium caudatum see Paramecium caudatum Ehrenberg, 1838