Hystrichosphaera crassipellis

"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