Palaeoperidinium "paradoxum" Jin Guangxing, He Chengquan and Zhu Shenzhao in He Chengquan et al., 1989, p.58–59, pl.4, figs.15–17.

Holotype: He Chengquan et al., 1989, pl.4, fig.17.
NOW Morkallacysta. Originally Palaeoperidinium, subsequently (and now) Morkallacysta.
Age: Early Tertiary.