Hedbergella kuznetsovae

Taxonomy

Original description: Test a low trochospire, completely evolute and flat or slightly concave on the spiral side, with 6-8 chambers in the last whorl. On the spiral side, chambers are inflated, subglobular, approximately as high as long, intercameral sutures being depressed and radial or very slightly oblique, the spire opens slowly; on the spiral side the test diameter is 2.5-2.8 times the height of the last formed chamber. The umbilicus is broad (about 0.27 of the test diameter) and shallow; on this side, the sutures are depressed and radial. The aperture is a low arch, from the umbilicus to the periphery of the penultimate whorl, with a distinct porticus which broadens slightly posteriorly; discrete relict apertures and their portici are open for at least half of the last whorl. The wall is smooth and microperforate, the external openings of the perforations being 0.6-0.7 microns in diameter, spaced at 1.3-5 microns distance.

Entries in the Catalog of original descriptions: Blefuscuiana kuznetsovae

Geological Range:
Last occurrence (top): within P. rohri zone (113.22-116.60Ma, top in Aptian stage). Data source: Banner et al., 1997
First occurrence (base): within H. sigali zone (130.37-134.74Ma, base in Valanginian 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 kuznetsovae compiled by the pforams@mikrotax project team viewed: 13-5-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110248 Go to Archive.is to create a permanent copy of this page - citation notes

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