Microhedbergella renilaevis

Taxonomy

Original description: Test wall microperforate with randomly scattered pores averaging 0.8 microns in diameter, surface smooth. Test small, low to rarely moderately low trochospiral, equatorial periphery subrounded, moderately to strongly lobate; weakly biconvex; chambers subglobular, usually reniform in equatorial view and a slightly compressed oval shape in edge view, dextrally or sinistrally coiled in two whorls of from 8 to 11 chambers that increase moderately in size, usually with 4, rarely 3 and up to 5.5 chambers in the final whorl; sutures depressed, radial, straight; umbilicus shallow, moderately wide, averaging 24% of the test diameter; aperture an extraumbilical low arch that extends from the equatorial peripheral margin almost to the umbilicus, bordered by a narrow lip that usually broadens to an imperforate portical flap that may partly cover the umbilicus, with relict portici surrounding the umbilicus.

Entries in the Catalog of original descriptions: Microhedbergella renilaevis

Geological Range:
Last occurrence (top): within T. primula zone (107.39-111.84Ma, top in Albian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of M. renilaevis zone (0% up, 113.2Ma, in Albian stage). Data source: zonal marker (from Timescale Creator)

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: Microhedbergella

Microhedbergella renilaevis compiled by the pforams@mikrotax project team viewed: 10-10-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110354 Go to Archive.is to create a permanent copy of this page - citation notes

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