Morkallacysta paradoxa (Jin Guangxing, He Chengquan and Zhu Shenzhao in He Chengquan et al., 1989, p.58–59, pl.4, figs.15–17) Mao Shaozhi et al., 1995, p.52.

Originally Palaeoperidinium, subsequently (and now) Morkallacysta.

Holotype: He Chengquan et al., 1989, pl.4, fig.17.
Age: Early Tertiary.