Apteodinium micracanthum, Cookson and Eisenack, 1974

Stover and Evitt, 1978, considered this to be a "problematical species" of Apteodinium

Holotype: Cookson and Eisenack, 1974, pl.25, fig.3
Locus typicus: Eucla Basin, W Australia
Stratum typicum: Albian-Senonian

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Original description: [Cookson and Eisenack, 1974, p. 51]: (Translation: LPP):

Description:
Outline of shell nearly spherical, epitract slightly pointed with conical to cylindrical sharply delimited apical horn ending with a slit-like indention. Shell covered with a few relatively long and solid, thorn-like processes. Girdle indicated by rows of thorns.
Archaeopyle wide but low.

Dimensions:
Shell c. 70x74 µm, apical horn c.4 µm, length of processes 1-2 µm.