Discoaster emblematicus

Discoaster emblematicus de Kaenel & Bergen in de Kaenel et al. 2017

Emended Description: Hexagonal symmetrical species have a wide, flat central area and short, robust arms that terminate in wrenched-like bifurcation. The inter-arm area is rounded. The distal side is ornamented with indistinct sutural ridges.

Discoaster emblematicus differs from Discoaster deflandrei by having sutural ridges on the distal side and wrenched-like bifurcations. The central area of Discoaster deflandrei is featureless, and its bifurcations are rounded. Discoaster emblematicus is distinguished from Discoaster hughesii by lacking proximal bulging with ridges.

De Kaenel, E., Bergen, J. A., Browning, E., Blair, S. A. & Boesiger, T.M. 2017. Uppermost Oligocene to Middle Miocene Discoaster and Catinaster taxonomy and stratigraphy in the circum North Atlantic Basin, Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research, 37 (2-3): 215–244.

Varol, O. & Bowman, A. R. 2024. The New Middle Miocene Genus Olladiscoaster, and Related and Associated Discoasters. Grzybowski Foundation Special Publication, 28: 1-103 pp.