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Hystrichosphaeridium spiralisetum

"Hystrichosphaeridium spiralisetum" de Wit, 1943, p.383; text-figs.2,11.

TYPE: Holotype: de Wit, 1943, text-figs.2,11, lost according to de Wit (personal communication to GLW).

HISTORY: NOW: Impletosphaeridium?. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium?, fourthly (and now) Impletosphaeridium?.

AGE: Late Cretaceous.


Infraspecific taxa:


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