Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Peridiniobiota Starobogatov ex Doweld (2001) Subkingdom Peridiniobiotina Doweld (2001) Phylum Peridiniophyta Engl. (1909) 1 Subphylum Peridiniophytina Potonie (1894) 2 Subphylum Syndiniophytina Fensome, Taylor, Norris, Sarjeant, Wharton & Williams (1993) [monotypic]