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Guembelitria cretacea


Classification: pf_mesozoic -> Guembelitriidae -> Guembelitria -> Guembelitria cretacea
Sister taxa: G. cenomana, G. cretacea, G. sergipensis, G. sp.

Taxonomy

Citation: Guembelitria cretacea Cushman 1933
Rank: Species
Basionym: Guembelitria cretacea

Type images:

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

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 (79.20-84.19Ma, base in Santonian stage). Data source:

Plot of range and occurrence data:

Character matrix

test outline:Triangularchamber arrangement:Triserialedge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Pore moundsshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.0-3.5 N.B. These characters are used for advanced search. N/A - not applicable

References:

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V 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

Missing or ambiguous references: Cushman 1933 32-38;


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Guembelitria cretacea compiled by the pforams@mikrotax project team viewed: 25-10-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110220 Go to Archive.is to create a permanent copy of this page - citation notes



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