Impagidinium brevisulcatum
From dinoflaj2
"brevisulcatum" Michoux, 1985, p.144-145, pl.1, figs.9-11; text-fig.4. Holotype: Michoux, 1985, pl.1, fig.10; Jan du Chêne et al., 1986a, pl.56, figs.4-6. NOW Ynezidinium. Originally Impagidinium, subsequently (and now) Ynezidinium. Age: Mid Eocene.
Parent: Impagidinium
