Smith and Pessagno 1973_4f8-10-188.JPG
Smith and Pessagno 1973_5f1-2-188.JPG
ODP Site 1049-188~a.JPG
Martin 1972_3f7-188.JPG
Smith and Pessagno 1973_4f8-10-188.JPG
Smith and Pessagno 1973_5f1-2-188.JPG
ODP Site 1049-188~a.JPG
Martin 1972_3f7-188.JPGTaxonomy
holotype: P. brazoensis
holotype: P. brazoensis
paratype: P. brazoensis
paratype: P. brazoensisOriginal description: Test flabelliform, inflated, especially in early portion. Six rapidly expanding chambers in biserial portion; 10 inflated, globular chambers in multiserial portion. Sutures fairly distinct, depressed. Coarse, discontinuous, longitudinal costae over entire test, separated by 2 or more rows of randomly arranged pores; costae somewhat finer on last row of chambers. Arched, basal apertures on front and back of all but outermost chambers in the last row; outermost chambers with apertures on front only, facing inward.
Entries in the Catalog of original descriptions: Planoglobulina brazoensis
Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. gansseri zone (71.75-72.97Ma, base in Campanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Character matrix
| test outline: | Subtriangular | chamber arrangement: | Multiserial | edge view: | Compressed | aperture: | Multiple |
| sp chamber shape: | Globular | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin flange |
| umb chbr shape: | Globular | umbilicus: | N/A | periph margin shape: | Broadly rounded | accessory apertures: | N/A |
| spiral sutures: | Moderately depressed | umb depth: | N/A | wall texture: | Coarsely costate | shell porosity: | |
| umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4.0-6.0 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Martin, S. E. (1972). Reexamination of the Upper Cretaceous planktonic foraminifera genera Planoglobulina and Ventilabrella Cushman. Journal of Foraminiferal Research. 2(2): 73-92. gs 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 V OReferences:
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Planoglobulina brazoensis compiled by the pforams@mikrotax project team viewed: 21-4-2021
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