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Adnatosphaeridium vetusculum

"Adnatosphaeridium vetusculum" Davey, 1974, p.45, pl.1, figs.1-2.

TYPE: Holotype: Davey, 1974, pl.1, fig.2.

HISTORY: NOW: Nexosispinum. Originally Adnatosphaeridium, subsequently Systematophora, thirdly (and now) Nexosispinum, fourthly Kiokansium.

AGE: Early Barremian.


Infraspecific taxa:


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