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 Coccidiasina Leuckart, 1879
             Order Eucoccidiorida Léger & Duboscq, 1910 see Subclass Coccidia Leuckart, 1879
               Suborder Eimeriorina Léger, 1911 see Order Eimeriida Léger, 1911
                 1 Family Spirocystidae Léger & Duboscq, 1915
                 2 Family Selenococcidiidae Poche, 1913
                 3 Family Aggregatidae Labbé, 1899
                 4 Family Cryptosporidiidae Léger, 1911
                 5 Family Lankesterellidae Nöller, 1920
                 6 Family Eimeriidaeᵀ Minchin, 1903
                 7 Family Calyptosporiidae Overstreet et al., 1984 see Family Calyptosporidae Overstreet, Hawkins & Fournie, 1984
                 8 Family Sarcocystidae Poche, 1913
                 9 Family Elleipsisomatidae Upton, 2000