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Hystrichosphaeridium asperum

"Hystrichosphaeridium asperum" Maier, 1959, p.319, pl.33, fig.2.

EMENDATION: Sarjeant, 1983, p.113-114, as Polysphaeridium asperum.

TYPE: Holotype: Maier, 1959, pl.33, fig.2.

HISTORY: NOW: Polysphaeridium. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Dapsilidinium, fourthly (and now) Polysphaeridium.

AGE: Mid Miocene.


Infraspecific taxa:


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