Archaeoglobigerina

Daughter taxa (time control age-window is: 0-800Ma)
			Archaeoglobigerina australis
			Archaeoglobigerina blowi
			Archaeoglobigerina bosquensis
			Archaeoglobigerina cretacea
			Archaeoglobigerina mateola
			Archaeoglobigerina sp. Specimens which cannot be assigned to established species

Taxonomy

Original description: Test trochospiral. biconvex to slightly spiroconvex, umbilicate; periphery rounded, but not truncate; with or without imperforate peripheral band or weakly developed double keel. Chambers spherical to ovate, inflated. Suture depressed on both spiral and umbilical sides. straight to curved. Wall perfectly smooth to somewhat rugose; rugosities not aligned in meridionial pattern. Primary aperture umbilical, interiomarginal, covered by tegilla with intralaminal and infralaminal accessory apertures in perfectly preserved specimens. Outer wall radial hyaline perforate except for keels which are both radial hyaline imperforate and partly ultragranular hyaline, imperforate and the rugosities which are ultragranular hyaline, imperforate. Septal walls and tegilla microgranular hyaline. finely perforate.

Entries in the Catalog of original descriptions: Archaeoglobigerina

Distinguishing features:
Parent taxon (Rugoglobigerinidae): Test trochospiral, chambers inflated, periphery rounded, not carinate; wall with pustules, costellae, or other rugosities; aperture umbilical, with portici or tegilla.
This taxon: Test a low to flat trochospire, chambers globular and enlarging rapidly, four to six in the final whorl, sutures radial and depressed, umbilicus wide, occupying one-fourth to one-third of the diameter, periphery rounded, without keel or imperforate carinal band, peripheral outline lobate; wall calcareous, perforate, surface rugose, with irregularly arranged pustules and costellae, never meridionally aligned; primary aperture interiomarginal, umbilical, with tegilla filling the umbilicus and provided with both proximal and distal accessory apertures.

Geological Range:
Last occurrence (top): at top of A. mayaroensis zone (100% up, 67.6Ma, in Maastrichtian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within M. schneegansi zone (89.75-92.51Ma, base in Turonian stage). Data source: Total of ranges of species in this 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
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Rugoglobigerinidae

Archaeoglobigerina compiled by the pforams@mikrotax project team viewed: 10-12-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110010 Go to Archive.is to create a permanent copy of this page - citation notes

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