Parvphylum Sporozoa Leuckart, 1879 see Superclass Sporozoa Leuckart, 1879
   Class Gregarinomorphea Grassé, 1953
     Subclass Orthogregarinia Cavalier-Smith, 2014
       Order Arthrogregarida Cavalier-Smith, 2014
         Suborder Terragregarina Cavalier-Smith, 2014
           Superfamily Actinocephaloidea Léger, 1892
             Family Monocystidae Bütschli, 1882
               1 Genus Monocystis Stein, 1848
               2 Genus Ascogregarina Ward, Levine & Craig, 1982
               3 Genus Paraschneideria Nieschulz, 1924 [monotypic]