Tetrachacysta biconvexa subsp. granulata

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.  Holotype: Liu Zhili et al., 1992, pl.10, fig.7.  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.  Age: Early Tertiary.

Parent: Tetrachacysta biconvexa