nmn

Petaloglobigerina


Classification: pf_mesozoic -> Conoglobigerinidae -> Petaloglobigerina
Sister taxa: Conoglobigerina, Globuligerina, Petaloglobigerina
Daughter taxa (time control age-window is: 0-800Ma)
Petaloglobigerina simmonsi

Taxonomy

Citation: Petaloglobigerina Gradstein, in Gradstein & Waskowska 2021
Rank: Genus
Basionym: Petaloglobigerina Gradstein, in Gradstein & Waskowska 2021

Original description: Test trochospiral, low spired, final whorl large and often flat with 3.5–4 petaloide and ovate chambers, rarely finger like; chamber periphery may become narrow and pointed, but not imperforate. In larger specimens, individual chambers in the last whorl may slightly twist from the axis of coiling; sutures strongly incised; umbilicus narrow or closed; aperture a narrow slit with rim at base of last chamber in umbilical position. A small and incomplete (half) bulla may be rarely present, covering the aperture. Wall microperforate and densely pustulose, with pustules fusing to form irregular ridges.

Entries in the Catalog of original descriptions: Petaloglobigerina

Geological Range:
Last occurrence (top): within Early Kimmeridgian Substage (154.73-157.25Ma, top in Kimmeridgian stage). Data source: Gradstein & Waskowska 2021
First occurrence (base): within Callovian Stage (163.47-166.07Ma, base in Callovian stage). Data source: Gradstein & Waskowska 2021

Plot of range and occurrence data:

References:

Gradstein, F. & Waskowska, A. (2021). New insights into the taxonomy and evolution of Jurassic planktonic foraminifera. Swiss Journal of Palaeontology. 140(1): 1-12. gs V O

Morozova, V. G. & Moskalenko, T. A. (1961). Планктонные фораминиферы пограничных отложений байосского и батского ярусов Центрального Дагестана (Северо-Восточный Кавказ) [Foraminiferes planctoniques des depots limitrophes du Bajocien et du Bathonien du Daghestan central (Nord-Est du Caucase)]. Voprosyi Mikropaleontologii. 5: 3-30. gs

Simmons, M. D., Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (1997). The Jurassic Favusellacea, the earliest Globigerina. In, Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (eds) The Early Evolutionary History of Planktonic Foraminifera. British Micropalaeontological Society Publication Series. 17-30. gs V O


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Petaloglobigerina compiled by the pforams@mikrotax project team viewed: 17-5-2021

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110592 Go to Archive.is to create a permanent copy of this page - citation notes



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