organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     alveolates Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Apicomplexa Levine, 1970 see Infraphylum Apicomplexa Levine, 1970
         Class Conoidasida Levine, 1988 see Superclass Sporozoa Leuckart, 1879
           Subclass Gregarinasina Dufour, 1828
             Order Eugregarinorida Léger, 1900
               Suborder Septatorina Lankester, 1885
                 Superfamily Stenophoricae Levine, 1984 see Superfamily Stenophoroidea
                   Family Stylocephalidae Ellis, 1912
                     01 Genus Stylocephalus Ellis, 1912
                     02 Genus Stylocephaloides Théodoridès, Desportes & Jolivet, 1965
                     03 Genus Cystocephalus Schneider, 1886
                     04 Genus Bulbocephalus Watson, 1917
                     05 Genus Xiphocephalus Théodoridès, 1964
                     06 Genus Lophocephalus Labbé, 1899, nom. illeg.
                     07 Genus Lophocephaloides Théodoridès, Desportes & Jolivet, 1965
                     08 Genus Sphaerorhynchus Labbé, 1899
                     09 Genus Oocephalus Schneider, 1886
                     10 Genus Campanacephalus Théodoridès, 1955
                     11 Genus Clavicephalus Théodoridès, 1960
                     12 Genus Cystocephaloides Théodoridès & Jolivet, 1963
                     13 Genus Orbocephalus Nelson, 1970
                     14 Genus Lepismatophila Adams & Travis, 1935
                     15 Genus Colepismatophila Adams & Travis, 1935