Palaeoperidinium amplum
From dinoflaj2
"amplum" (Harland, 1973, p.673-674, pl.84, figs.1,7; text-fig.8) Lentin and Williams, 1976, p.109. Holotype: Harland, 1973, pl.84, fig.1. Originally Lejeunia (generic name illegitimate), subsequently Astrocysta (combination not validly published), thirdly Palaeoperidinium. Taxonomic senior synonym: Palaeoperidinium cretaceum, according to Harker and Sarjeant in Harker et al. (1990, p.128). Age: Late Campanian.
Parent: Palaeoperidinium
