Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818 Class Ciliata see [unranked] ciliates Order Holotricha Suborder Hymenostomata Genus [Ichthyophthirius] Fouquet, 1876 1 Ichthyophthirius multifilius see Ichthyophthirius multifiliis Fouquet, 1876