Oroscena carolae

Taxonomy

Catalog entries: Oroscena carolae

Original description: Shell single, subspherical to ellipsoidal, rarely ovoidal. Lattice coarse to fine. Upper spines club-shaped to cylindrical; lower spines variable. Lattice lamellar, with pores varying greatly in size between specimens. Pores are usually triangular or quadrangular, sometimes slightly rounded, and often appear more rounded when viewed obliquely because of the thickness of the bars. Bars circular to elliptical in cross section, the radial dimension being the greater one. Ribs seldom conspicuous but can usually be distinguished in apical area, where they often form a three-rayed figure or a cross. Spines very approximately 20-40 in number. Spines on upper end of shell are radial, and those on lower end tend to be curved downward. Bases of spines rarely elevated above shell surface. Spines at upper end of shell vary from short and club-shaped to long, thin and rod-shaped, between individuals. Spines at lower end of shell rod-shaped, laterally branched, rarely digitately branched, or club-shaped with branched tip Surface texture of spines usually rough.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Oroscena

Oroscena carolae compiled by the radiolaria@mikrotax project team viewed: 15-12-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204845 Go to Archive.is to create a permanent copy of this page - citation notes

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