Muricohedbergella sliteri

Taxonomy

Original description: Test coiled in a low trochospire and sometimes nearly planispiral, often flattened on the spiral side, convex on the umbilical side, average diameter 0.273 mm, average breadth 0.123 mm. Chambers inflated, slightly reniform to globular, increasing gradually in size, usually five to six in the final whorl, four and one-half to six in the penultimate whorl, 12 to 15 comprising the entire test of adult specimens, final chamber normalform or sometimes kummerform. Proloculus diameter averaging 0.17 mm, initial whorl diameter averaging 0.74 mm, with a mean of 5.0 chambers in the initial whorl. Sutures strongly depressed, radial and straight on the spiral and umbilical sides. Umbilicus shallow, broad, averaging 28% of the maximum test diameter. Aperture a low, interiomarginal arch, extra-umbilical, sometimes positioned very near the equatorial periphery, bordered by a narrow porticus. Relict apertures and apertural flaps well-developed. Test surface nearly smooth to finely pustulose, outer wall radial hyaline, finely perforate.

Entries in the Catalog of original descriptions: Hedbergella sliteri

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.64-69.27Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within C. plummerae zone (75.91-79.33Ma, base in Campanian 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.
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Muricohedbergella sliteri, synonyms included - Hedbergella sliteri;
• See also space-time plot :: Samples map :: Parent: Muricohedbergella

Muricohedbergella sliteri compiled by the pforams@mikrotax project team viewed: 13-7-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110376 Go to Archive.is to create a permanent copy of this page - citation notes

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