| Daughter taxa: (blue => in age window 0-800Ma) | ||||
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| Specimens which cannot be assigned to established species | ||||
Taxonomy
Original description: Guembelitria Cushman, 1933: 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
Cushman, J.A., (1933). Some new foraminiferal genera. Contributions from the Cushman Laboratory for Foraminiferal Research, 9(2): 32-38. GS Loeblich, A.R. & Tappan, H. (Editors), (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York, 1059 pp. GSReferences:
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Guembelitria compiled by the pforams@mikrotax project team viewed: 20-5-2019
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 |