Tetrachacysta allenii
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*allenii Backhouse, 1988, p.110, pl.42, figs.la-b,2a-b,3; text-figs.32A-C. Holotype: Backhouse, 1988, pl.42, figs.la-b; text-figs.32B-C; Fensome et al., 1993a, figs.1-2 - p.905. Taxonomic junior synonym: Horologinella biconvexa subsp. granulata, according to Xu Jinli et al. (1997, p.42). Age: ?Valanginian-Early Barremian.
Parent: Tetrachacysta
