Denisea turkmenii

Denisea turkmenii Varol, 2022

Large elliptical Denisea species have a large empty central area.

In honour of Ismet Türkmen, retired Geologist, Trabzon, Turkey.

Length: 9.20 μm; width: 8.44 μm; the length of the central area: 6.02 μm; the width of the central area: 5.26 μm; width of the pelaga: 1.59 μm

Large (9.0–12.0 μm) elliptical Denisea species have a birefringent tube cycle, two shields, and a large empty central area. The width of the central area is at least twice the width of the pelaga. The separation of the tube cycle and shields is better seen in bright-field and phase-contrast illuminations.

Denisea turkmenii, Denisea polymegalo and Denisea foramena have large, empty central areas. Denisea turkmenii differs from Denisea foramena and Denisea polymegalo in its elliptical shape. It is further differentiated from Denisea foramena by its large size (> 9.0 μm); the latter’s size ranges from 5.0 to 9.0 μm.

Varol, O. 2022. Denisea, a new genus of Paleocene calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 304/2 (2022): 159-186.