Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Peridiniobiota Starobogatov ex Doweld (2001)
       Subkingdom Peridiniobiotina Doweld (2001)
         Phylum Gregarinozoa Kussakin & Drozdov, 1998
           Class Eimeriatea Doweld, 2001
             1 Order Rhytidocystida Doweld, 2001
             2 Order Eleutheroschizonida Doweld, 2001
             3 Order Eimeriida Léger, 1911