|Citation: Areoligeraceae Evitt 1963b.|
Diagnosis:Gonyaulacineans in which at least the anterior part of the sulcus is offset to the left. There tends to be dorsoventral compression of the fossilizable cyst and asymmetry in the antapical outline.
Adnatosphaeridium Williams and Downie 1966c; Early Eocene.
Canninginopsis Cookson and Eisenack 1962b; Cretaceous (Albian-Cenomanian).
Circulodinium Alberti 1961; Cretaceous (Valanginian-Hauterivian).