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 Gregarinicae Chakravarty, 1960 see Superfamily Gregarinoidea Labbé, 1899
                   Family Gregarinidaeᵀ Labbé, 1899
                     Genus Gregarina Dufour, 1828
                       1 Gregarina ovataᵀ Dufour, 1828
                       2 Gregarina munieri (Schneider, 1875) Labbé, 1899
                       3 Gregarina cuneata von Stein, 1848
                       4 Gregarina steini Berndt, 1902
                       5 Gregarina scutovertexi Erhardová, 1955
                       6 Gregarina euzeti Lipa, 1982
                       7 Gregarina hyalella Batten & DeGiusti, 1949
                       8 Gregarina cavalierina