Pentagonum huanghuaense

"huanghuaense" Jiabo, 1978, p.56, pl.1, figs.1–3. Holotype: Jiabo, 1978, pl.1, fig.1. NOW Palaeoperidinium. Originally Pentagonum (generic name illegitimate), subsequently (and now) Palaeoperidinium. Following I.C.N. Article 55.1, the species name Pentagonum huanghuaense is validly published even though the generic name Pentagonum is illegitimate. Age: Early Tertiary.