Nannotax3 - ntax_Farinacci - Olladiscoaster vestigium Nannotax3 - ntax_Farinacci - Olladiscoaster vestigium

CATALOG - Olladiscoaster vestigium


Folder trail: ntax_Farinacci -> O -> Olladiscoaster -> Olladiscoaster vestigium
Folders this level: O. asterilithos, O. bordii, O. cruxii, O. cruzii, O. exagonikoasteri, O. lepidus, O. molae, O. perplexus, O. superbus, O. vestigium, O. zucchiae

Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification:

Compiled data

Citation: Olladiscoaster vestigium Varol & Bowman 2024
Taxonomic rank: species
Type specimens: Holotype: Plate 30, Figs. 1-24 (same specimen in mobile mount).
Type age (chronostrat): Zone NN6, Middle Miocene.
Standardised type level: 122_MIDDLE MIOCENE
Type locality: USGS-NASA Langley core Hampton, VA, USA
Type repository: Varol Research, Llandudno
Repository Country: Wales


Original Description

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.

Size:
Dimensions of holotype: 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).

Etymology:
From the Latin vestigium, trace - refers to its vestigial arm

Extra details from original publication
Remarks: Olladiscoaster vestiguum differs from Olladiscoaster tokerae by having a large proximal knob and a more squarish appearance of its segments.

Occurrence: This species is recorded from ODP Leg 154, Hole 926A Cear? Rise, IODP Leg 354, Hole 1451B, Ninetyeast Ridge, Bengal Fan, Indian Ocean, USGS-NASA Langley core 134.4 m, Hampton, VA, USA and various commercial oil wells in the Gulf of Mexico.

Stratigraphic range: Middle Miocene (Zones NN5-NN6).

Editors' Notes
The species is variously refered to Olladiscoaster vestigium and Olladiscoaster vestiguum in the paper. The etymology makes it clear the correct spelling is vestigium.

References:

Varol, O. & Bowman, A. R. (2024). The new Middle Miocene genus Olladiscoaster, and related and associated discoasters. Grzybowski Foundation Special Publication. 28: 1-102. gs


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Olladiscoaster vestigium: Catalog entry compiled by Jeremy Young. Viewed: 5-3-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=55773 Go to Archive.is to create a permanent copy of this page - citation notes

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