pforams@mikrotax - Guembelitria pforams@mikrotax - Guembelitria

Guembelitria


Classification: pf_mesozoic -> Guembelitriidae -> Guembelitria
Sister taxa: Guembelitria
Daughter taxa (time control age-window is: 0-800Ma)
Guembelitria cenomana

Guembelitria cretacea

Guembelitria sergipensis

Guembelitria sp.
Specimens which cannot be assigned to established species

Taxonomy

Citation: Guembelitria Cushman 1933
Taxonomic rank: genus
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:
Parent taxon (Guembelitriidae): Early stage trochospiral, triserial, or biserial, later may show serial reduction or proliferation.
This taxon: 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): at top of P1b subzone (100% up, 63.9Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within P. cheniourensis zone (118.02-118.93Ma, base in Aptian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

References:

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

Missing or ambiguous references: Cushman 1933 32-38;


logo

Guembelitria compiled by the pforams@mikrotax project team viewed: 16-12-2025

Taxon Search:
Advanced Search

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



Add Comment

* Required information
Captcha Image

Comments

No comments yet. Be the first!