Conoglobigerina caucasica

Taxonomy

Original description: Translation from Russian: Test small, diameter no more than 0.23 mm, usually oval, concavo-convex, low trochoid, height about twice as small as the diameter. Coil made up of 2-2.5 whorls. Early chambers very small, weakly convex, oval or rounded in outline, hard to discern and only slightly surmounting the chambers of the last whorl. There are four or five of them. In the last whorl are four chambers, rapidly increasing in dimensions, relatively low, and somewhat flattend. Septal sutures depressed, slightly curved in the early chambers and nearly straight in the later ones. Peripheral margin narrow, rounded, outline of test distinctly lobate. Umbilicus small, narrow. Aperture opens into umbilicus and extends along the base of the last chambers, not reaching the peripheral margin, arcuate, fringed with a narrow, slightly expressed lip, filled with rock in the specimens studied. Wall finely perforate.

Entries in the Catalog of original descriptions: Globuligerina caucasica

Geological Range:
Last occurrence (top): within Valanginian Stage (132.60-137.70Ma, top in Valanginian stage). Data source: [copied from Chronos database]
First occurrence (base): within Berriasian Stage (137.70-143.10Ma, base in Berriasian stage). Data source: [copied from Chronos database]

Plot of range and 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: Conoglobigerina

Conoglobigerina caucasica compiled by the pforams@mikrotax project team viewed: 19-9-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110058 Go to Archive.is to create a permanent copy of this page - citation notes

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