Tetrachacysta parvita (Liu Zhili and Zheng Yuefang in Liu Zhili et al., 1992, p.67, pl.7, figs.26–28) He Chengquan et al., 2009, p.377.

Originally Dinogymnium, subsequently (and now) Tetrachacysta.

Holotype: Liu Zhili et al., 1992, pl.7, fig.26.
Age: Early Tertiary.