Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Peridiniobiota Starobogatov ex Doweld (2001) Subkingdom Peridiniobiotina Doweld (2001) Phylum Peridiniophyta Engl. (1909) Subphylum Syndiniophytina Fensome, Taylor, Norris, Sarjeant, Wharton & Williams (1993) [monotypic] Class Syndiniophyceae A.R. Loebl. (1976) see Class Syndinea Chatton, 1920