pforams@mikrotax - Laeviella tururensis pforams@mikrotax - Laeviella tururensis

Laeviella tururensis


Classification: pf_mesozoic -> Globigerinelloididae -> Laeviella -> Laeviella tururensis
Sister taxa: L. bentonensis, L. bollii, L. primuloides, L. tururensis

Taxonomy

Citation: Laeviella tururensis (Bronnimann 1952)
taxonomic rank: species
Basionym: Globigerinella tururensis Bronnimann 1952
Synonyms:
Taxonomic discussion: Transferred to Laeviella by Huber et al. 2022

Type images:

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:

References:

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. gs


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Laeviella tururensis compiled by the pforams@mikrotax project team viewed: 26-6-2024

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