Olladiscoaster vestigium
Set number: 3829
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10µm
In the mobile mount
Olladiscoaster vestigium Varol & Bowman, 2024
Hexagonal, gently stellate species of Olladiscoaster have diamond-shaped segments with quasi-arms. On the distal side, the distinct sutural ridges are created by the deep cavities. The sutural ridges are raised towards the centre and capped by boomerang-shaped distal covers. The distinct proximal ridges with a large petaloid knob decorate the bulged proximal side. The proximal knob is dominant in the side view of Olladiscoaster vestigium.
Maximum diameter: 7.26 µm, Maximum height: 6.11 µm; Diameter of the central area: 5.26 µm, Diameter of the proximal knob: 5.25 µm, Height of the proximal knob: 2.02 µm, Length of the quasi-arm: 1.00 µm, (measurements from bright field micrograph).
Olladiscoaster vestiguum differs from Olladiscoaster tokerae by having a large proximal knob and a more squarish appearance of its segments.
Varol, O. 1984. New Neogene calcareous nannofossil taxa from Malta and southern Turkey. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 6: 375–384.
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.
Holotype
Olladiscoaster vestigium
Varol & Bowman, 2024
Middle Miocene
USGS-NASA Langley Core, Hampton, VA (USA)