living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
         Phylum Ciliophora Doflein, 1901 - ciliates
           Class Kinetofragminophora see Class Kinetofragminophorea
             Subclass Vestibulifera see Subclass Vestibuliferia de Puytorac et al., 1974
               Order Trichostomatida Bütschli, 1889 see Subclass Trichostomatia Bütschli, 1889
                 Suborder Trichostomatina Bütschli, 1889 see Subclass Trichostomatia Bütschli, 1889
                   Family Protocaviellidae Grain, in Corliss, 1979