From Fensome et al., 2019:
Brigantedinium irregulare Matsuoka, 1987, p.56–57, pl.5, figs.13–16; text-fig.4C ex Head, 1996b, p.1231. Holotype: Matsuoka,
1987, pl.5, figs.15–16. Motile equivalent: Protoperidinium denticulatum (Gran and Braarud 1935) Balech, 1974,
according to Matsuoka (1987, p.57). This name was not validly published in Matsuoka (1987, p.56–57) since the
generic name Brigantedinium was not validly published at that time. Age: Holocene.

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