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Tetrachacysta biconvexa ssp. granulata
Tetrachacysta biconvexa subsp. granulata (Zheng Yuefang and Liu Xuexian in Liu Zhili et al., 1992, p.70, pl.10, figs.3–8) He Chengquan et al., 2009, p.374.
Originally Horologinella biconvexa subsp. granulata, subsequently (and now) Tetrachacysta biconvexa subsp. granulata.
Taxonomic senior synonym: Tetrachacysta allenii, according to Xu Jinli et al. (1997, p.42) — however, He Chengquan et al., 2009, p.374) retained this taxon.
Holotype: Liu Zhili et al., 1992, pl.10, fig.7.
Age: Early Tertiary.
Originally Horologinella biconvexa subsp. granulata, subsequently (and now) Tetrachacysta biconvexa subsp. granulata.
Taxonomic senior synonym: Tetrachacysta allenii, according to Xu Jinli et al. (1997, p.42) — however, He Chengquan et al., 2009, p.374) retained this taxon.
Holotype: Liu Zhili et al., 1992, pl.10, fig.7.
Age: Early Tertiary.