Horologinella biconvexa

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"biconvexa" Jiabo, 1978, p.95, pl.29, figs.20-21.  Holotype: Jiabo, 1978, pl.29, fig.21.  NOW Tetrachacysta.  Originally Horologinella, subsequently (and now) Tetrachacysta.  Age: early Tertiary.

Parent: Horologinella

Infrataxon List: