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 Apicomplexa Levine, 1970 see Infraphylum Apicomplexa Levine, 1970
           Class Sporozoa Leuckart, 1879 see Class Sporozoea
             Subclass Gregarinia see Subclass Gregarinasina Dufour, 1828
               Order Eugregarinida Léger, 1899 see Order Eugregarinorida Léger, 1900
                 Suborder Acephalina see Suborder Aseptatorina Chakravarty, 1960
                   Family Monocystidae Bütschli, 1882
                     Subfamily Stomatophorinae Bhatia, 1930
                       Genus Stomatophora Drzhevetskii, 1907
                       Genus Craterocystis Cognetti de Martiis, 1918
                       Genus Albertisella Cognetti de Martiis, 1926
                       Genus Astrocystella Cognetti de Martiis, 1918
                       Genus Parachoanocystoides de Saedeleer, 1930
                       Genus Choanocystoides Cognetti de Martiis, 1925
                       Genus Zeylanocystis Dissanaike, 1953
                       Genus Arborocystis Rees & Howell, 1966
                       Genus Chakravartiella Misra & Raychaudhury, 1973
                       Genus Beccaricystis Cognetti de Martiis, 1926