Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
     Class Flagellata see Subphylum Mastigophora Diesing, 1866
       Order Polymastigina Blochmann
         Family Trichomonadidae Chalmers & Pekkola, 1918
           1 Genus [Trichomonas] Donné, 1836