Apteodinium tuberculatum, Cookson and Eisenack, 1970

Holotype: Cookson and Eisenack, 1970, pl.12, fig.14; Jan du Chene et al., 1986, pl.14, figs.9-11
Locus typicus: Madura No. 1 Bore at 1073-1104 ft
Stratum typicum: Senonian

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Original description: [Cookson and Eisenack, 1970, p. 146]:

Description:
Shell untabulated, relatively large, broadly oval in outline with a short, solid, median apical horn which narrows from a relatively broad base to a small apex ornamented by a small terminal and two minute lateral spiny projections. A relatively wide, median, spiral girdle is clearly outlined, and a large archeopyle occupies a considerable portion of the epitheca. The surface of the shell is ornamented with low, closely arranged, somewhat spinous thickenings.

Dimensions:
Holotype: c. 128 µm long, 105 µm broad.