Taxonomy
Original description: Test flabelliform, laterally compressed, with 6-8 subglobular chambers in biserial portion; up to 10 subglobular to pyriform chambers in multiserial portion. Longitudinal costae very heavy on biserial portion; costae finer and discontinuous on multiserial portion. Sutures indistinct, depressed. Arched, basal apertures on front and back of all but outermost chambers in final row; outermost chambers with apertures on front only, facing inward.
Entries in the Catalog of original descriptions: Ventilabrella browni
Character matrix
| test outline: | Palmate | chamber arrangement: | Multiserial | edge view: | Compressed | aperture: | Multiple |
| sp chamber shape: | Inflated | coiling axis: | N/A | periphery: | N/A | aperture border: | N/A |
| umb chbr shape: | Inflated | umbilicus: | N/A | periph margin shape: | N/A | accessory apertures: | None |
| spiral sutures: | Weakly depressed | umb depth: | N/A | wall texture: | Meridional costellae | shell porosity: | Microperforate: <1µm |
| umbilical or test sutures: | Weakly depressed | final-whorl chambers: | 6-10 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Geological Range:
Last occurrence (top): within G. ventricosa zone (76.18-79.20Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. elevata zone (79.33-83.65Ma, base in Campanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Martin, S. E. (1972). Reexamination of the Upper Cretaceous planktonic foraminifera genera Planoglobulina and Ventilabrella Cushman. Journal of Foraminiferal Research. 2(2): 73-92. gsReferences:

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Planoglobulina browni compiled by the pforams@mikrotax project team viewed: 25-1-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=110393 Go to Archive.is to create a permanent copy of this page - citation notes |
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