Subfamily Dinogymnioideae

Subfamily Dinogymnioideae

Citation: Dinogymnioideae ( Sarjeant and Downie 1974) Fensome et al. 1993b. Diagnosis:Ptychodiscaceans in which dinosporin is the principal element in the pellicle and in which the ecdysal aperture is apical. Type genus: Dinogymnium Evitt et al. 1967; fossil - Late Cretaceous (Maastrichtian). Fossil genera: Alisogymnium Lentin and Vozzhennikova 1990; Late Cretaceous (Senonian). Amphigymnium Lentin and Vozzhennikova 1990; Late Cretaceous (Turonian-Senonian). Dinogymnium Evitt et al. 1967; Late Cretaceous (Maastrichtian). Yolkinigymnium Lentin and Vozzhennikova 1990; Late Cretaceous (Campanian-Maastrichtian).

Family Ptychodiscaceae