Hystrichosphaera crassipellis
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"crassipellis" Deflandre and Cookson, 1955, p.265, pl.6, figs.2-3; text-fig.20. Holotype: Deflandre and Cookson, 1955, pl.6, figs.2-3. NOW Achomosphaera. Originally Hystrichosphaera, subsequently Spiniferites, thirdly (and now) Achomosphaera. Taxonomic junior synonyms: Achomosphaera recurvata and Hystrichosphaera (subsequently Spiniferites) membranosa, according to Quattrocchio and Sarjeant (1996, p.116). Hystrichosphaera crassipellis was not validly published in Deflandre and Cookson (1954, p.1236), who did not give a description. Age: Early Eocene.
Parent: Hystrichosphaera