|Daughter taxa (time control age-window is: 0-800Ma)|
Specimens which cannot be assigned to established species
Original description: Genus similar to Eouvigerina in size, biserial arrangement of most chambers and spout-like uvigerine aperture, but differing in first and last stages. The early chambers show not the slightest trace, even in the microspheric form, of spiroplectine coiling; the final chambers have no tendency to become irregularly triserial, the whole test being regularly bolivine throughout.
The general similarities to Eouvigerina (especially of the aspera and gracilis type, which have somewhat the same ornament) are so marked that close relationship must surely exist. If so, the elision of the theoretical coiled early chambers and the more settled and compact development throughout is probably due to the later appearance in time of this genus, Eouvigerina proper being an Upper Cretaceous form, while the New Zealand development is Upper Middle Eocene.
Entries in the Catalog of original descriptions: Zeauvigerina
Parent taxon (Heterohelicidae): Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.
This taxon: Test biserial until final chamber, which becomes or shows a tendency to become uniserial
Last occurrence (top): at top of Danian Stage (100% up, 61.6Ma, in Selandian stage). Data source: Total of range of species in this database
First occurrence (base): in mid part of Maastrichtian Stage (48% up, 69.2Ma, in Maastrichtian stage). Data source: Total of range of species in this database
Plot of range and occurrence data:
Finlay, H. J. (1939d). New Zealand Foraminifera: The Occurrence of Rzehakina, Hantkenina, Rotaliatina, and Zeauvigerina. Transactions of the Royal Society of New Zealand. 68(4): 534-543. gs Missing or ambiguous references: ;
Finlay, H. J. (1939d). New Zealand Foraminifera: The Occurrence of Rzehakina, Hantkenina, Rotaliatina, and Zeauvigerina. Transactions of the Royal Society of New Zealand. 68(4): 534-543. gs
Missing or ambiguous references: ;
Zeauvigerina compiled by the pforams@mikrotax project team viewed: 30-9-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=110581 Go to Archive.is to create a permanent copy of this page - citation notes
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