Subfamily Dinogymnioideae

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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 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

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