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
           Genus [Trichomonas] Donné, 1836
             1 Trichomonas ardindelteili
             2 Trichomonas hominis (C. Davaine, 1860) M. Braun, 1903 see Pentatrichomonas hominis (C. Davaine, 1860) D.H. Wenrich, 1931
             3 Trichomonas tenax
             4 Trichomonas vaginalis
             5 Trichomonas fecalis