Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
     Class Ciliata see [unranked] ciliates
       Order Spirotricha
         Suborder Entodiniomorpha
           Genus Entodinium Stein, 1859
             1 Entodinium caudatum