Apteodinium cornutum, Cookson and Eisenack, 1974

Holotype: Cookson and Eisenack, 1974, pl.24, fig.9; Jan du Chene et al., 1986, pl.14, figs.1-4
Locus typicus: Rivernook, Victoria, Australia
Stratum typicum: Paleocene

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

Diagnosis:
Outline pear-shaped, epitract arched and pointed, hypotract hemisphaerically rounded. Epitract with relatively long, solid and pointed apical horn. Girdle furrow wide, bordered by low ridges, two widestanding tips (antapical horns) at the antapex, shell relatively thick (2 µm) and granulate.

Dimensions:
Shell c. 84x70 µm, horn c. 15 µm, width of girdle c. 10 µm, High of ridges c. 1 µm. One specimen.