Areoligera danica, W. Wetzel, 1952

Now Achomosphaera. Originaily Areoligera, subsequently Baltisphaeridium (by Downie and Sarjeant, 1965), thirdly Hystrichosphaeridium, fourthly Cleistosphaeridium, fifthly (and now) Achomosphaera.
Tax. jr. synonym of Areoligera senonensis Lejeune-Carpentier, 1938, according to LejeuneCarpentier and Sarjeant, 1981. Sarjeant, 1984, retained Areoligera (as Achomosphaera) danica as a separate species.

Holotype: W. Wetzel, 1952, pl.A, fig.6
Locus typicus: Kiel district, Germany
Stratum typicum: Danian flint from the German drift (Jungdiluvium)

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Original diagnosis: [W. Wetzel, 1952, p. 396]: (Translation: Sarjeant, 1984):

Diagnosis:
A species of the genus Areoligera with high-arched capsule and distinctive, separately formed processes.