Daughter taxa (time control age-window is: 0-800Ma) | ||||
Liuenella falklandica | ||||
Liuenella globigerinellinoides | ||||
Liuenella punctata | ||||
Liuenella sp. | ||||
Liuella sp. Specimens which cannot be assigned to established species |
Taxonomy
Original description:
Diagnosis. Smooth, very low trochospiral test, finely perforate to macroperforate test wall, crater-like pores on the earlier chambers and imperforate peripheral band throughout the final whorl.
Description. Test low to very low trochospiral with globular to subglobular chambers, separated by straight, incised and radial sutures. Test biconvex, nearly symmetrical in edge view. Periphery broadly rounded with a wide imperforate band throughout the final whorl. Main aperture is in the shape of a low to medium high arch, peripheral-umbilical in position and bordered by an imperforate lip. Test wall calcitic, hyaline, perforate, with perforation diameters ranging between 1.7 and 3.1 mm. Test surface smooth.
Entries in the Catalog of original descriptions: Liuella, Liuenella
Distinguishing features:
Parent taxon (Hedbergellidae): Test trochospirally coiled, primary aperture interiomarginal, extraumbilical-umbilical, with prominent apertural lip, apertures of earlier chambers remain visible around the umbilical region; no sutural secondary apertures.
This taxon: Smooth, very low trochospiral test, finely perforate to macroperforate test wall, crater-like pores on the earlier chambers and imperforate peripheral band throughout the final whorl.
Geological Range:
Last occurrence (top): at top of G. ventricosa zone (100% up, 76.2Ma, in Campanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Albian Stage (100.50-113.20Ma, base in Albian stage). Data source: Total of ranges of species in this database
Plot of range and occurrence data:
Georgescu, M. D. (2008a). A new planktonic foraminifer (Family Hedbergellidae Loeblich and Tappan, 1961) from the lower Campanian sediments of the Falkland Plateau, South Atlantic Ocean (DSDP Site 511). Journal of Foraminiferal Research. 38: 157-161. gs Georgescu, M. D. (2010a). Liuenella, new name for Liuella Georgescu, 2008. Journal of Foraminiferal Research. 40: 206-. gsReferences:
Liuenella compiled by the pforams@mikrotax project team viewed: 9-10-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110315 Go to Archive.is to create a permanent copy of this page - citation notes |
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Comments (2)
Liuella Georgescu, 2008 is a junior homonym of Liuella Wang & Bai, 1992 (Arthropoda, Chelicerata, Arachnida) and was given the replacement name Liuenella in Georgescu, 2010
see: http://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=1034676
Cheers,
François
Thanks I will rename this