Taxonomy
Original description: Medium to small-sized test, moderately high to high trochospire, macroperforate wall; circular outline, asymmetrical lateral profile with convex spiral side and concave umbilical side; equatorial periphery lobate with two closely spaced rows of pustules or weakly developed keels at least at the beginning of the last whorl, that usually merge in the final chambers; four to five chambers in the last whorl, often cross-shaped and moderately increasing in size as added. Spiral side with crescentic chambers in the last whorl; chamber surface smooth to slightly pustulose and flat; sutures curved and raised. Umbilical side with trapezoidal chambers; chamber surface inflated and more pustulose; sutures straight and depressed. Primary aperture extra-umbilical-umbilical; umbilical area about 1/4 of the maximum diameter.
Entries in the Catalog of original descriptions: Praeglobotruncana clotensis
Geological Range:
Notes: Full range not established
Last occurrence (top): within H. helvetica zone (92.51-93.52Ma, top in Turonian stage). Data source: Falzoni et al. 2016
First occurrence (base): within R. cushmani zone (94.03-98.69Ma, base in Cenomanian stage). Data source: Falzoni et al. 2016
Plot of range and occurrence data:
Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin, SE France). Cretaceous Research. 59: 69-97. gsReferences:
Praeglobotruncana clotensis compiled by the pforams@mikrotax project team viewed: 20-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110427 Go to Archive.is to create a permanent copy of this page - citation notes |
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