Diagnosis:Peridiniaceans in which the episomal tabulation is bipesioid and the Kofoid second anterior intercalary plate is hexa (i.e. six-sided). The cyst is organic-walled. The archeopyle involves anterior intercalary plates and precingular plates and sometimes also the dorsal third apical plate.
Chichaouadinium Below 1981a; Cretaceous (Albian). Colonsaydinium Hunt in Hunt et al. 1985; Late Quaternary. ?Diconodinium Eisenack and Cookson 1960; Cretaceous (Santonian). Dioxya Cookson and Eisenack 1958; Cretaceous (Albian). Geiselodinium Krutzsch 1962; Mid Eocene.
Ginginodinium Cookson and Eisenack 1960a; Cretaceous (Albian-Cenomanian). ?Indosphaera Kumar 1986b; Jurassic (Kimmeridgian-Tithonian). Jinhudinium Qian Zeshu et al. 1986; Paleocene-Eocene. Laciniadinium McIntyre 1975; Cretaceous (Campanian).
Luxadinium Brideaux and McIntyre 1975; Cretaceous (Albian). Nanshadinium He Chengquan and Sun Xuekun 1991; Quaternary. Palaeohystrichophora Deflandre 1935; Cretaceous (Senonian). Palaeoperidinium Deflandre 1934; Late Cretaceous.
?Phthanoperidinium Drugg and Loeblich Jr. 1967; Oligocene. Saeptodinium Harris 1974; Paleocene. Sanshuia Yu Jingxian et al. 1981; Late Cretaceous. Soaniella Vozzhennikova 1967; Eocene-Early Oligocene. Subtilisphaera Jain and Millepied 1973; Cretaceous (Aptian). Teneridinium Krutzsch 1962; Eocene. Vectidinium Liengjarern et al. 1980; Late Eocene-Early Oligocene. Williamsidinium Lentin 1983; Cretaceous (Maastrichtian).
