From Fensome et al., 2019:
Alterbidinium prominense, Vasilyeva in Andreeva-Grigorovich et al., 2011, p.44–45, pl.12, figs.5–6,9–11; text-fig.18e ex Williams and Fensome, 2016, p.139.
Holotype: Andreeva-Grigorovich et al., 2011, pl.12, figs.10–11; text-fig.18e, designated by Williams and Fensome (2016, p.139).
This name was not validly published by Vasilyeva in Andreeva-Grigorovich et al. (2011, p.44–45) since the holotype citation (pl.12, figs.5–6, 9–11 and text-fig.18e) includes more than one specimen. The holotype was clearly designated in Williams and Fensome (2016), thus validating the name Alterbidinium prominense.
Age: Danian–Selandian.

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