Planoglobulina acervulinoides

Taxonomy

Original description: Test biserial in the earlier pseudotextulariid stage becoming multiserial when adult. Multiserial part of the test consists of maximum six sets of chamberlets. Chambers increasing rapidly in size as added in the earlier part of the test, the adult part presenting quasi-parallel sides in dorso-ventral view. Sutures distinct, depressed, somehow obscured in the juvenile part due to the addition of calcitic material. Test wall calcitic, macroperforate. Chamber surface ornamented with thicker and discontinuous costae, more or less parallel to the periphery. Test ornamentation distinctly coarser in the earlier part of the test. Periphery broadly to moderately rounded without peripheral structures. Multiple apertures in the adult stage, bordered by thin flanges.

Entries in the Catalog of original descriptions: Guembelina acervulinoides

Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.64Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within Campanian Stage (72.17-83.65Ma, 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: Planoglobulina acervulinoides, synonyms included - Planoglobulina acervulinoides; Planoglobulina brazoensis; Ventilabrella ornatissima;
• See also space-time plot :: Samples map :: Parent: Planoglobulina

Planoglobulina acervulinoides compiled by the pforams@mikrotax project team viewed: 15-8-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110391 Go to Archive.is to create a permanent copy of this page - citation notes

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