Astrocysta ampla
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"ampla" (Harland, 1973, p.673–674, pl.84, figs.1,7; text-fig.8) Harker and Sarjeant, 1975, p.264. Holotype: Harland, 1973, pl.84, fig.1. Combination not validly published: basionym not fully referenced. 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: Astrocysta