From Fensome et al., 2019:
Tetrachacysta magnusa (Liu Zhili and Zheng Yuefang in Liu Zhili et al., 1992, p.70–71, pl.10, fig.11; text-fig.4) He Chengquan et al., 2009, p.375.
Holotype: Liu Zhili et al., 1992, pl.10, fig.11; text-fig.4.
Originally Horologinella, subsequently (and now) Tetrachacysta.
Age: early Tertiary.

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