arrayname: original
Taxonomy
Original description: The general outline of the only slightly compressed and not very lobulate test is ellipsoid. The semi-involute last volution comprises 6 to 7 appressed chambers which are subglobular at first then become distinctly laterally compressed. The chambers increase gradually in size, and the end chamber usually is considerably larger and more compressed than the penultimate one. The large subcircular umbilici are filled with matrix. The distinct sutures are straight but their direction is oblique. The large, low arcuate aperture is apparently situated in the equatorial plane at the base of the end chamber. The walls are thin, finely perforate, and the surface is smooth.
Entries in the Catalog of original descriptions: Globigerinella tururensis, Planomalina alvarezi
Most likely ancestor: Laeviella bentonensis - at confidence level 3 (out of 5). Data source: Huber et al. 2022.
Geological Range:
Last occurrence (top): within G. aegyptiaca zone (73.80-74.20Ma, top in Campanian stage). Data source: Huber et al. 2022
First occurrence (base): within Late Albian Substage (100.50-107.59Ma, base in Albian stage). Data source: Huber et al. 2022
Plot of range and occurrence data:
Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs Huber, B. T., Petrizzo, M. M. & Falzoni, F. (2022b). Taxonomy and phylogeny of Albian–Maastrichtian planispiral planktonic foraminifera traditionally assigned to Globigerinelloides. Micropaleontology. 68(2): 117-183. gsReferences:
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Laeviella tururensis compiled by the pforams@mikrotax project team viewed: 20-4-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110603 Go to Archive.is to create a permanent copy of this page - citation notes |
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