Phylum Dinoflagellata Engl. (1903) see Superclass Dinoflagellata Bütschli, 1885 Subphylum Syndinea Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993) [monotypic] Class Syndiniophyceae A.R. Loebl. (1976) [monotypic] see Class Syndinea Chatton, 1920 Order Syndiniales A.R. Loebl. (1976) 1 Family Syndiniaceae Chatton (1920) 2 Family Amoebophryaceae Cachon ex A.R. Loebl. (1970) [monotypic] 3 Family Sphaeriparaceae A.R. Loebl. (1970) 4 Family Duboscquellaceae Chatton ex A.R. Loebl. (1970) 5 Genus Atelodinium Chatton (1920), incertae sedis see Genus Syndinium Chatton (1910)