Taxonomy
Original description: Planulina cheniourensis n. sp. semble très caractéristique par son test un peu évolute el les lèvres ombilicales des loges
Translation. "Appears to be very distinctive with its slightly evolute test and the umbilical lips of the chambers."
Entries in the Catalog of original descriptions: Planulina cheniourensis
Character matrix
test outline: | Circular | chamber arrangement: | Pseudoplanispiral | edge view: | Compressed | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Petaloid | coiling axis: | Very low | periphery: | Single keel | aperture border: | Thin lip |
umb chbr shape: | Petaloid | umbilicus: | Wide | periph margin shape: | Narrowly rounded | accessory apertures: | None |
spiral sutures: | Weakly depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Weakly depressed | final-whorl chambers: | 10-0 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within P. rohri zone (113.22-116.60Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): in upper part of G. algerianus zone (80% up, 117.1Ma, in Aptian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Lipson-Benitah, S. & Almogi-Labin, A. (2004). Lipson-Benitah, S. & Almogi-Labin, A. (2004). Aptian planktonic foraminifera from Israel. Israel Journal of Earth Sciences. 53(1): 27-46. Israel Journal of Earth Sciences. 53(1): 27-46. gs Sigal, J. (1952). Sigal, J. (1952). Apercu stratigraphique sur la micropaleontologie du Cretace. XIX Congr. géol. internat., Algers, Monographies Regionales. 1(26): 3-43. XIX Congr. géol. internat., Algers, Monographies Regionales. 1(26): 3-43. gsReferences:
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Pseudoplanomalina cheniourensis compiled by the pforams@mikrotax project team viewed: 12-7-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110463 Go to Archive.is to create a permanent copy of this page - citation notes |
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