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Hystrichosphaera membranosa

"Hystrichosphaera membranosa" Archangelsky, 1969b, p.197-199, pl.3, figs.1-4.

TYPE: Holotype: Archangelsky, 1969b, pl.3, figs.1-3.

HISTORY: Originally Hystrichosphaera, subsequently Spiniferites.

SYNONYM(S): Taxonomic senior synonym: Hystrichosphaera (as and now Achomosphaera) crassipellis, according to Quattrocchio and Sarjeant (1996, p.116).

AGE: Late Eocene.


Infraspecific taxa:


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