Muricohedbergella rosebudensis

Taxonomy

Original description: Test low trochospiral (according to E & M), biumbilicate, involute to slightly evolute, laterally compressed with a broad imperforate peripheral band, peripheral margin ovate, lobate; 6-7 chambers in the final whorl; chambers in lateral view ovoid, weakly inflated, increasing gradually in size as added; chambers in apertural view initially spherical to subspherical, expanding only slightly in width as added, terminal 2-3 chambers becoming compressed and elongate-ellipsoidal in shape, umbilici wide, shallow; evolute side showing portions of chambers of previous whorls, opporsite side more strongly involute; sutures radial, straight to slightly curved, depressed; early chambers of the last whole; wall rather coarsely perforate except for broad imperforate peripheral band; aperture interomarginal, spiro-umbilical, a broad asymmetrical arch extending onto the umbilical side of the test; primary aperture bordered by a thickened, well-developed lip extending into the umbilici; liplike relict apertural borders of terminal 2-3 chambers preserved in umbilical area.

Entries in the Catalog of original descriptions: Globigerinelloides rosebudensis, Globotruncana (Rugoglobigerina) beldingi beldingi, Globotruncana (Rugoglobigerina) beldingi subbeldingi

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 G. gansseri zone (71.73-73.80Ma, 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 rosebudensis, synonyms included - Globigerinelloides beldingi; Globigerinelloides rosebudensis; Globigerinelloides subbeldingi; Globotruncana beldingi beldingi; Globotruncana beldingi subbeldingi; Planomalina ehrenbergi;
• See also space-time plot :: Samples map :: Parent: Muricohedbergella

Muricohedbergella rosebudensis compiled by the pforams@mikrotax project team viewed: 9-8-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110375 Go to Archive.is to create a permanent copy of this page - citation notes

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