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Hystrichosphaeridium danicum

"Hystrichosphaeridium danicum" (W. Wetzel, 1952, p.396-397, pl.A, figs.5-6; text-fig.8) W. Wetzel, 1955, p.34.

EMENDATION: Sarjeant, 1984c, p.129-130, as Achomosphaera danica.

TYPE: Holotype: W. Wetzel, 1952, pl.A, fig.6.

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

SYNONYM(S): Taxonomic senior synonym: Areoligera senonensis, according to Lejeune-Carpentier and Sarjeant (1981, p.15) - however, Sarjeant (1984c, p.130) retained Hystrichosphaeridium (as Achomosphaera) danicum.

AGE: Paleocene.


Infraspecific taxa:


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