Taxonomy
Original description: "Test compressed, all chambers in one plane, subglobular, the early ones biserial, later ones spreading out irregularly, sides in the adult nearly parallel, periphery rounded; sutures distinct, somewhat depressed; wall calcareous, perforate, the earlier ones ornamented by longitudinal costae, each somewhat beaded; aperture in the adult irregular, near the base of the chamber."
Entries in the Catalog of original descriptions: Ventilabrella ornatissima
Character matrix
test outline: | Subtriangular | chamber arrangement: | Multiserial | edge view: | Compressed | aperture: | Multiple |
sp chamber shape: | Inflated | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin flange |
umb chbr shape: | Inflated | umbilicus: | N/A | periph margin shape: | Broadly rounded | accessory apertures: | N/A |
spiral sutures: | Moderately depressed | umb depth: | N/A | wall texture: | Finely costate | shell porosity: | - |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 0-0 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.17Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within Campanian Stage (72.17-83.65Ma, base in Campanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Cushman, J. A. & Church, C. C. (1929). Some Upper Cretaceous foraminifera from near Coalinga, California. Proceedings of the California Academy of Sciences. 18(16): 497-530. gs Georgescu, M. D., Saupe, E. E. & Huber, B. T. (2009). Morphometric and stratophenetic basis for phylogeny and taxonomy in Late Cretaceous gublerinid planktonic foraminifera. Micropaleontology. 54(5): 397-424. gsReferences:
Ventilabrella ornatissima compiled by the pforams@mikrotax project team viewed: 5-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110569 Go to Archive.is to create a permanent copy of this page - citation notes |
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