Hedbergella praelippa

Taxonomy

Original description: Test wall microperforate with randomly distributed pores, pore diameter ranging 0.6 to 0.8 microns, surface smooth or with weakly developed perforation cones. Test very small, coiled in a low to rarely moderate trochospire, equatorial periphery moderately lobate, equally biconvex, test thickness:diameter ratio averaging 0.55; chambers subgobular to globular, dextrally, or sinistrally coiled in a low trochospire consisting of 2 whorls of 8 to 9 chambers that increase rapidly in size, ultimate:penultimate ratio averaging 1.14, antepentultimate:ultimate ratio averaging 1.3, with 4.0 to 4.5 chambers in the final whorl, final chamber face extends in the direction of coiling; sutures moderately depressed, radial, straight; umbilicus shallow, narrow, umbilical: test diameter ratio averaging 1.4; aperture an extra-umbilical low arch that extends from near the peripheral margin into the umbilicus, without a bordering lip.

Entries in the Catalog of original descriptions: Hedbergella praelippa

Geological Range:
Last occurrence (top): within Aptian Stage (113.20-121.40Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within Aptian Stage (113.20-121.40Ma, base in Aptian 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
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Hedbergella

Hedbergella praelippa compiled by the pforams@mikrotax project team viewed: 11-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110256 Go to Archive.is to create a permanent copy of this page - citation notes

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