Tetrachacysta dawanensis
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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