Palaeoperidinium "muriciforme" Conrad, 1941, p.7, pl.1, fig.K. Holotype: Conrad, 1941, pl.1, fig.K.
Name not validly published: generic name not validly published until 1967. NOW Palaeohystrichophora?.
Originally Palaeoperidinium (name not validly published), subsequently (and now) Palaeohystrichophora?.
Age: Maastrichtian.