Whiteinella inornata

Taxonomy

Original description: Shape of test low trochospiral, biconvex; the equatorial periphery strongly lobate, early chambers of last whorl rounded at periphery, last and occasionally penultimate chambers compressed with sharp peripheral edge or faint keel. Wall calcareous, perforate surface of early chambers in well-preserved specimens showing some rugosity. Chambers subangular, compressed; fourteen to sixteen, arranged in three whorls; the four chambers of the last whorl increase rapidly in size, early whorls small by comparison. Sutures of spiral side slightly curved, depressed, of umbilcal side straight, depressed. Umbilical shallow, wide. Primary apertures interiomarginal, umbilical; tegilla with accessory apertures poorly preserved in examined specimens. The coiling predominantly dextral; of fifty specimens counted, only four coiled sinistrally. 

Entries in the Catalog of original descriptions: Globotruncana inornata

Geological Range:
Last occurrence (top): within D. asymetrica zone (83.65-85.60Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within W. archaeocretacea zone (93.52-94.03Ma, base in Cenomanian 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: Whiteinella inornata, synonyms included - Globotruncana inornata; Marginotruncana inornata; Whiteinella inornata;
• See also space-time plot :: Samples map :: Parent: Whiteinella

Whiteinella inornata compiled by the pforams@mikrotax project team viewed: 10-5-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110578 Go to Archive.is to create a permanent copy of this page - citation notes

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