Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Peridiniobiota Starobogatov ex Doweld (2001) Subkingdom Peridiniobiotina Doweld (2001) Phylum Gregarinozoa Kussakin & Drozdov, 1998 Class Gregarinatea Grasse, 1953 Order Gregarinida Poche, 1913 see Subclass Gregarinasina Dufour, 1828