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 Hypermastigidae
           1 Genus [Joenia] Grassi, 1885
           2 Genus [Trychonympha] see Genus Trichonympha Leidy, 1877
           3 Genus [Microspironympha] Koidzumi, 1921 see Genus Spironympha Koidzumi, 1917
           4 Genus [Kofoidia] Light, 1927
           5 Subfamily Hoplonymphinae see Family Hoplonymphidae Light, 1926