Inversidinium caudatum

"caudatum" Benson, 1976, p.218,220, pl.13, figs.4–6. Holotype: Benson, 1976, pl.13, figs.4–6. NOW Palaeotetradinium. Originally Inversidinium, subsequently (and now) Palaeotetradinium. Age: late Maastrichtian–early Paleocene.