From Fensome et al., 2019:
Zhongyuandinium simplex Zhu Shenzhao, He Chengquan and Jin Guangxing in He Chengquan et al., 1989

Taxonomic senior synonym: Zhongyuandinium decorosum, according to Mao Shaozhi et al. (1995, p.62).

Holotype: He Chengquan et al., 1989, pl.10, fig.1
Age: Early Tertiary