Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Peridiniobiota Starobogatov ex Doweld (2001) Subkingdom Peridiniobiotina Doweld (2001) Phylum Peridiniophyta Engl. (1909) Subphylum Peridiniophytina Potonie (1894) Class Peridiniophyceae Knoblauch (1890)