Dinogymnium downiei Boltenhagen, 1977

Now Alisogymnium. Originally Dinogymnium, subsequently (and now) Alisogymnium.
Holotype: Boltenhagen, 1977, pl.11, figs.8a-c; Lentin and Vozzhennikova, 1990, Appendix A, fig.36
Age: Campanian-Maastrichtian