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The First 40 Million Years of Planktonic Foraminifera

Natural History Museum, University of Oslo, 0318 Oslo, Norway
Faculty of Geology, Geophysics and Environmental Protection, AGH University of Sciences and Technology, 30-059 Kraków, Poland
Trofimuk Institute of Petroleum Geology and Geophysics, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Author to whom correspondence should be addressed.
Academic Editors: Lucilla Capotondi, Maria Rose Petrizzo, Angela Cloke-Hayes and Jesus Martinez-Frias
Geosciences 2021, 11(2), 85;
Received: 10 December 2020 / Revised: 26 January 2021 / Accepted: 8 February 2021 / Published: 13 February 2021
(This article belongs to the Special Issue Application of Foraminifera in Biochronology)
We provide a biochronology of Jurassic planktonic foramininfera, using first order linkage to ammonite and nannofossil stratigraphy and geochronology. This enigmatic and understudied group of microfossils occurred from middle Toarcian through Tithonian time, from ~180 to ~143 Ma; its origin is unknown. There are three genera: Globuligerina, Conoglobigerina and Petaloglobigerina. The genus Globuligerina, with a smooth to pustulose test surface texture appeared in Toarcian (late Early Jurassic) and Conoglobigerina, with a rough reticulate test surface texture in Oxfordian (early Late Jurassic) time. The genus Petaloglobigerina, having a petaloid last whorl with one or more claviform and twisted chambers evolved in early Kimmeridgian time from Globuligerina balakhmatovae. Biochronologic events for Jurassic planktonic foraminifera are most like First Common Appearance or Last Common Appearance events. The very first or very last appearance levels of taxa are not easily sampled and detected. We recognize stratigraphic events from eleven species across four postulated evolutionary lineages, calibrated to Geologic Time Scale 2020. A faunal change, which is not well documented led to the survival of only one taxon, most likely Gobuligerina oxfordiana in the Tithonian. View Full-Text
Keywords: planktonic foraminifera; Jurassic; chronostratigraphy; biochronology; evolution planktonic foraminifera; Jurassic; chronostratigraphy; biochronology; evolution
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MDPI and ACS Style

Gradstein, F.; Waskowska, A.; Glinskikh, L. The First 40 Million Years of Planktonic Foraminifera. Geosciences 2021, 11, 85.

AMA Style

Gradstein F, Waskowska A, Glinskikh L. The First 40 Million Years of Planktonic Foraminifera. Geosciences. 2021; 11(2):85.

Chicago/Turabian Style

Gradstein, Felix, Anna Waskowska, and Larisa Glinskikh. 2021. "The First 40 Million Years of Planktonic Foraminifera" Geosciences 11, no. 2: 85.

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