Taxonomy
Original description: Test free, small, elongate, biserial, tapering towards the prolocular end, compressed. Chambers subglobular, 17, the first
7 inceasing slowly in size and the last 10 increasing more rapidly in size. Wall calcareous, finely perforate. Sutures subparallel in side view, slightly depressed, distinct. Aperture terminal, oval-shaped, symmetrical, with its open end towards the penultimate chamber.
Entries in the Catalog of original descriptions: Chiloguembelina waiparaensis
Character matrix
test outline: | Subtriangular | chamber arrangement: | Biserial | edge view: | Compressed | aperture: | Interiomarginal |
sp chamber shape: | Subrectangular | coiling axis: | N/A | periphery: | N/A | aperture border: | N/A |
umb chbr shape: | Subrectangular | umbilicus: | N/A | periph margin shape: | Moderately rounded | accessory apertures: | N/A |
spiral sutures: | Weakly depressed | umb depth: | N/A | wall texture: | Finely pustulose | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Weakly depressed | final-whorl chambers: | 1-2 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within Danian Stage (61.61-66.04Ma, top in Danian stage). Data source: [copied from Chronos database]
First occurrence (base): within A. mayaroensis zone (67.64-69.27Ma, base in Maastrichtian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Jenkins, D. G. (1966b). Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. New Zealand Journal of Geology and Geophysics. 8 [1965](6): 1088-1126. gs Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. (85): 1-252. gsReferences:
Zeauvigerina waiparaensis compiled by the pforams@mikrotax project team viewed: 7-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110583 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments