pforams@mikrotax - Guembelitria

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Guembelitria

Classification: pf_mesozoic -> Guembelitriidae -> Guembelitria
Sister taxa: Guembelitria,

Daughter taxa: (blue => in age window 0-800Ma)
			Guembelitria cenomana
			Guembelitria cretacea
			Guembelitria sergipensis
			Guembelitria sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Guembelitria Cushman 1933

Rank: Genus

Basionym: Guembelitria cretacea

Type species: Guembelitria cretacea Cushman, 1933

Original description: Test similar to Guembelina, but triserial; wall calcareous, finely perforate; aperture large, at the inner edge of the last-formed chamber. This genus is widely distributed in the Upper Cretaceous of North and South America.

Entries in the Catalog of original descriptions: Guembelitria

Distinguishing features: Test subconical, chambers globular and inflated, triserial throughout, sutures distinct, depressed; wall calcareous, optically radial, finely and irregularly perforate, with each pore elevated on a pore mound; aperture an interiomarginal arch at the base of the final chamber, with an imperforate bordering lip.

Diagnostic characters: Test subconical, chambers globular and inflated, triserial throughout, sutures distinct, depressed; wall calcareous, optically radial, finely and irregularly perforate, with each pore elevated on a pore mound; aperture an interiomarginal arch at the base of the final chamber, with an imperforate bordering lip.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Aptian Stage (112.95-126.30Ma, base in Aptian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

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: Guembelitriidae

References:

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Guembelitria compiled by the pforams@mikrotax project team viewed: 18-9-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110218 Go to Archive.is to create a permanent copy of this page - citation notes

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