From Fensome et al., 2019:
Palaeohystrichodinium insuetum Liu Zhili and Zheng Yuefang in Liu Zhili et al., 1992, p.77, pl.12, figs.8–9. Holotype: Liu Zhili et al., 1992, pl.12, fig.8. Questionable assignment: Liu Zhili et al. (1992, p.77). Age: early Tertiary.

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