Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Peridiniobiota Starobogatov ex Doweld (2001)
       Subkingdom Peridiniobiotina Doweld (2001)
         Phylum Gregarinozoa Kussakin & Drozdov, 1998
           1 Class Gregarinatea Grasse, 1953
           2 Class Eimeriatea Doweld, 2001
           3 Class Babesiatea Möhn, 1984