From Frensome et al., 2019:

Palaeohystrichodinium, He Chengquan, Zhu Shenzhao and Jin Guangxing in He Chengquan et al., 1989, p.56.
Type: He Chengquan et al., 1989, pl.16, fig.4; text-fig.8, as Palaeohystrichodinium elegans.