Tetrachacysta minuta
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minuta (Zheng Yuefang and Liu Xuexian in Liu Zhili et al., 1992, p.70, pl.10, figs.9-10,12 - not text-fig.4) He Chengquan et al., 2009, p.376. Originally Horologinella, subsequently (and now) Tetrachacysta. Holotype: Liu Zhili et al., 1992, pl.10, fig.9. Age: early Tertiary.
Parent: Tetrachacysta