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Hystrichosphaeridium isocalamum

"Hystrichosphaeridium isocalamum" Deflandre and Cookson, 1955, p.272, pl.2, figs.7-8; text-figs.30-35.

TYPE: Holotype: Deflandre and Cookson, 1955, pl.2, figs.7-8.

HISTORY: NOW: Tanyosphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Tanyosphaeridium.

AGE: Early Cretaceous.


Infraspecific taxa:


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