Diconodinium biconicum (Jin Guangxing, He Chengquan and Zhu Shenzhao in He Chengquan et al., 1989, p.62, pl.7, figs.1-6; text-fig.9) Mao Shaozhi et al., 1995, p.53.

Originally Phthanoperidinium, subsequently (and now) Diconodinium.

Holotype: He Chengquan et al., 1989, pl.7, fig.6; text-fig.9.
Age: Early Tertiary.