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 intercalary plates only.
Abratopdinium Mao Shaozhi and Mohr 1992; Cretaceous (Campanian-Maastrichtian). Alterbidinium Lentin and Williams 1985; Cretaceous (Turonian).
Amphidiadema Cookson and Eisenack 1960a; Cretaceous (Senonian). Andalusiella Riegel 1974; Cretaceous (?Senonian). Arvalidinium Lentin and Vozzhennikova 1990; Cretaceous (Santonian). Bulbodinium O. Wetzel 1960; Cretaceous (Senonian). Cerodinium Vozzhennikova 1963; Paleocene-Eocene.
Chatangiella Vozzhennikova 1967; Cretaceous (Santonian).
Deflandrea Eisenack 1938b; Late Eocene-Early Oligocene. Eucladinium Stover and Evitt 1978; Cretaceous (Senonian). Eurydinium Stover and Evitt 1978; Cretaceous (Albian-Cenomanian). ?Evittodinium Deflandre 1964; Cretaceous (Senonian). Gippslandia Stover and Williams 1987; Mid-Late Eocene. Godavariella Mehrotra and Sarjeant 1987; Cretaceous (Maastrichtian). Hexagonifera Cookson and Eisenack 1961a; Cretaceous (Senonian). Isabelidinium Lentin and Williams 1977a; Cretaceous (Campanian-Maastrichtian).
Jainiella Khowaja-Ateequzzaman and Garg 1995; Late Cretaceous. Lentinia Bujak in Bujak et al. 1980b; Late Eocene. Manumiella Bujak and Davies 1983; Paleocene (Danian). Nelsoniella Cookson and Eisenack 1960a; Cretaceous (Santonian-Campanian). Palaeocystodinium Alberti 1961; Late Eocene-Late Oligocene.
Pierceites Habib and Drugg 1987; Cretaceous (?Cenomanian). Planoperidinium de Coninck 1986b; Oligocene (Rupelian). ?Pseudorhombodinium Wrenn 1996; Mid Eocene. ?Pyxidiella Cookson and Eisenack 1958; Late Jurassic. Satyrodinium Lentin and Manum 1986; Cretaceous (Campanian). Senegalinium Jain and Millepied 1973; Cretaceous (Campanian-Maastrichtian). Smolenskiella Vozzhennikova 1967; Late Cretaceous. Spinidinium Cookson and Eisenack 1962b; Cretaceous (Aptian-Albian). Svalbardella Manum 1960; Late Paleocene-Eocene. Trithyrodinium Drugg 1967; Paleocene (Danian). Trivalvadinium Islam 1983b; Mid Eocene. Uvatodinium Vozzhennikova 1963; Paleocene. Vozzhennikovia Lentin and Williams 1976; Paleocene-Oligocene. Xenikoon Cookson and Eisenack 1960a; Cretaceous (Turonian-Campanian). ?Xuidinium Mao Shaozhi and Norris 1988; Late Paleocene.
?Cystodiniopsis Vozzhennikova 1967 (not Vozzhennikova 1963); name not validly published.