Archaeoglobigerina blowi

Taxonomy

Original description: Test trochoid: lobulate peripherally. Chambers spherical. nearly as elongate as wide: about four or five in last whorl, rapidly increasing in size. Coiling predominantly dextral; sutures depressed, radial. straight to slightly curved spirally and umbilically. Umbilicus medium-sized and deep covered by tegilla with intralaminal and infralaminal accessory apertures in well-preserved specimens. Periphery occasionally with weakly developed double keel which occurs chiefly on the first one or two chambers of the final whorl. but usually keel-less with or without an imperforate peripheral band: nontruncate. Test surface either smooth throughout or somewhat rugose on the earlier chambers; last two or three chambers usually smooth irregardless of previous ornamentation. Primary aperture interiomarginal, umbilical in position. Outer wall except for rugosities, keels, and imperforate peripheraI band. raclial hyaline, perforate: rugosities ultragranular hyaline. imperforate; keels radial hyaline and ultragrnnular hyaline. imperforate; peripheral band radial hyaline imperforate.

Entries in the Catalog of original descriptions: Archaeoglobigerina blowi, Globotruncana pura

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.64-69.27Ma, top in Maastrichtian stage). Data source: Caron, 1985
First occurrence (base): within Dicarinella asymetrica zone (83.65-85.60Ma, base in Santonian 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: Archaeoglobigerina blowi, synonyms included - Archaeoglobigerina blowi; Archaeoglobigerina pura; Globotruncana para;
• See also space-time plot :: Samples map :: Parent: Archaeoglobigerina

Archaeoglobigerina blowi compiled by the pforams@mikrotax project team viewed: 9-10-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110012 Go to Archive.is to create a permanent copy of this page - citation notes

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