From Fensome et al., 2019:
Palaeoperidinium ?tenue Schumacker-Lambry, 1978, p.46–47, pl.4, figs.11–13. Holotype: Schumacker-Lambry, 1978, pl.4, fig.11. Questionable assignment: Evitt et al. (1998, p.48). Age: Late Paleocene (Landenian).

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