Whiteinella bornholmensis

Taxonomy

Original description: "Test free, low trochospiral, equatorial periphery strongly lobulate, axial periphery rounded. Chambers subglobular to subspherical, three and one half to four chambers in the final whorl; initial chambers increasing gradually insize, final three or four increasing very rapidly, last formed chamber much larger than penultimate, giving test a trilobate appearance. Spiral and umbilical sutures radial to slightly curved, depressed, distinct. Wall calcareous, perforate, surface covered with small spines. Umbilical deep and narrow in juvenile stage, becoming shallower in adult. Primary aperture is a high interiomarginal-umbilical arch a narrow bordering lip. "Comment. - The species is similar to Whiteinella baltica, Douglas and Rankin, but may be differentiated by, (1) the trilobate shape of the test, (2) the rapid whorl expansion in the final volution, and (3) the more extra-umbilical position of the primary aperture. Hedbergella portsdownensis (Williams-Mitchell) [Globigerina portsdownensis, 1948] is more strongly spiroconvex, has a smaller and deeper umbilicus and lacks the distinctive spinose surface. Apart from Bornholm Island, the species has been found in northern Germany and its presence is suspected in other parts of the Polish-Danish seaway."

Entries in the Catalog of original descriptions: Hedbergella bornholmensis

Geological Range:
Last occurrence (top): in lower part of Santonian Stage (30% up, 85.1Ma, in Santonian stage). Data source:
First occurrence (base): in lower part of Turonian Stage (30% up, 92.5Ma, in Turonian stage). Data source:

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: Whiteinella

Whiteinella bornholmensis compiled by the pforams@mikrotax project team viewed: 10-5-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110576 Go to Archive.is to create a permanent copy of this page - citation notes

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