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.
Type genus:
Deflandrea Eisenack 1938b; fossil - Late Eocene-Early Oligocene.
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.