Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
     Class Ciliata see [unranked] ciliates
       Order Holotricha
         Suborder Gymnostomata
           1 Genus [Didinium] Stein, 1859
           2 Genus [Coleps] Nitzsch, 1827
           3 Genus [Lacrymaria] Bory, 1824
           4 Genus [Dileptus] Dujardin, 1840