Taxonomy
Original description: Test small, triserial; chambers globular, nearly spherical; sutures much depressed; wall smooth, finely perforate; aperture large, semicircular or semi-elliptical at the inner margin of the last-formed chamber.
Entries in the Catalog of original descriptions: Guembelitria cretacea
Character matrix
test outline: | Triangular | chamber arrangement: | Triserial | edge view: | Spiroconvex | aperture: | Umbilical |
sp chamber shape: | Globular | coiling axis: | High | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Globular | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Strongly depressed | umb depth: | Shallow | wall texture: | Pore mounds | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 3-3.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): in mid part of P1b subzone (50% up, 64.6Ma, in Danian stage). Data source: Olsson et al., 1999
First occurrence (base): within G. elevata zone (79.2-84.19Ma, base in Santonian stage). Data source:
Plot of range and occurrence data:
Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs O Missing or ambiguous references: Cushman 1933 32-38; References:
![]() |
Guembelitria cretacea compiled by the pforams@mikrotax project team viewed: 10-12-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=110220 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments