Tetrachacysta dawanensis

dawanensis (Liu Zhili and Zheng Yuefang in Liu Zhili et al., 1992, p.70, pl.10, figs.13–14) He Chengquan et al., 2009, p.375.  Holotype: Liu Zhili et al., 1992, pl.10, fig.13.  Originally Horologinella, subsequently (and now) Tetrachacysta.  Age: Early Tertiary.

Parent: Tetrachacysta