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Dinogymnium biconicum

From Fensome et al., 2019:
Dinogymnium biconicum Jain and Millepied, 1975, p.136, pl.1, figs.3–4. Holotype: Jain and Millepied, 1975, pl.1, fig.4. Age: Campanian–Maastrichtian.

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Original description: [Jain and Millepied, 1975]:

Dinogymnium biconicum sp. nov. (PI. 1, Figs. 3-4)
Holotype - Pl. 1, Fig. 4; Slide No. 8668a-7.
Type Locality - Bore hole no. CM-4, depth 980 m; Senegal Basin, W. Africa.
Horizon - Campanian-Maestrichtian.

Diagnosis - Shell biconical, apical and antapical ends acutely pointed; cingulum distinct, dividing snell into two unequal halves, epitract much longer than hypotract; longitudinal folds running from cingulum to poles in both epi- and hypotract, simple, distantly placed, converging at poles; shell surface scabrate. Wall canals not discernible. Sulcus present. Archaeopyle apical, elongate.

Measurements
Shell length: holotype: 270 μm, range: 217-270 μm
Shell width: holotype: 133 μm, range: 98-133 μm
Cingulum Index: holotype: 62 μm, range: 60-62 μm

Comparison - D. biconicum sp. nov. differs from D. major sp. nov. and other species of the genus in its larger size and acutely pɔinted apical and antapical ends.
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