Planoheterohelix stenopos

Taxonomy

Original description: Test biserial, laterally compressed, un-keeled; elongate; minimal increase in width throughout; profile slightly lobate. Chambers 16-17 in number; only slightly inflated; each succeeding chamber but little larger than previous one, wider than deep. Pores of fine to moderate diameter in rows between costae. Costae discontinuous, of moderate width and height; conforming to the curvature of the chamber as viewed from the side. Aperture a low, narrow arch with an imperforate lip, which increases in width toward contact with previous chamber. The sides of the relict apertural lips expressed as depressed triangular areas between adjacent chambers. Sutures straight, depressed, normal to edge, imperforate.

Entries in the Catalog of original descriptions: Heterohelix stenopos

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source:
First occurrence (base): within Santonian Stage (83.64-86.26Ma, base in Santonian stage). Data source:

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: Planoheterohelix

Planoheterohelix stenopos compiled by the pforams@mikrotax project team viewed: 2-4-2023 Taxon Search: Advanced Search AphiaID: not found Short stables page link: https://mikrotax.org/pforams/index.php?id=110289 Go to Archive.is to create a permanent copy of this page - citation notes

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