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 Coccidia Leuckart, 1879
               Order Eucoccidiida see Order Eucoccidiorida Léger & Duboscq, 1910
                 Suborder Eimeriina see Suborder Eimeriorina Léger, 1911
                   Family Pfeifferinellidae Grassé, 1953 see Family Eimeriidae Minchin, 1903
                     Genus Pfeifferinella Wasielewski, 1904