Tetrachacysta spinulosa (Gao Ruiqi et al., 1992a, p.19–20,26, pl.1, figs.7–8) Mao Shaozhi et al., 1999, p.158.

Originally Dinogymniopsis, subsequently (and now) Tetrachacysta.
Taxonomic junior synonym: Dinogymnium velutinum, according to He Chengquan et al. (2009, p.377).

Holotype: Gao Ruiqi et al., 1992a, pl.1, fig.7.
Age: Cenomanian.