Muricohedbergella holmdelensis

Taxonomy

Original description: "Test very low trochospiral, nearly planispiral in appearance, much compressed; equatorial periphery strongly lobate; axial periphery rounded. Wall finely perforate, delicately hispid. Chambers five, occasionally six, in final whorl, increasing rather rapidly in size, moderately inflated, ovate, elongate in direction of coiling compressed ovate in axial view. Sutures depressed and gently curved on spiral side, depressed and radial on umbilical side. Aperture a low arch, interiomarginal, umbilical-extraumbilical, bordered by a thin lip; apertures of previously formed chambers open into the umbilicus. Greatest diameter of holotype 0.20 mm., greatest thickness 0.10 mm. Unfigured paratypes range from 0.15 to 0.24 mm. in maximum diameter, from 0.07 to 0.12 mm. in maximum thickness. Greatest diameter of figured paratype 0.26 mm., greatest thickness 0.10 mm. "

Entries in the Catalog of original descriptions: Hedbergella holmdelensis

Geological Range:
Last occurrence (top): within P0 zone (66.00-66.04Ma, top in Danian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. calcarata zone (75.06-75.91Ma, 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 holmdelensis, synonyms included - Hedbergella holmdelensis;
• See also space-time plot :: Samples map :: Parent: Muricohedbergella

Muricohedbergella holmdelensis compiled by the pforams@mikrotax project team viewed: 5-9-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110367 Go to Archive.is to create a permanent copy of this page - citation notes

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