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Swiss Journal of Palaeontology

, Volume 136, Issue 2, pp 161–185 | Cite as

New and emended species of Jurassic planktonic foraminifera

  • Felix M. GradsteinEmail author
Article

Abstract

Two Jurassic planktonic genera are emended and two new species and one subspecies of Jurassic planktonic foraminifera are defined. The genera are Globuligerina Bignot and Guyader 1971 and Conoglobigerina Morozova 1961 and the two new species are Globuligerina tojeiraensis Gradstein and Conoglobigerina grigelisi Gradstein. Both new species commonly occur in the Tojeira Formation, Montejunto, Portugal. The Tojeira Formation is a deeper marine shale unit of Early Kimmeridgian age. The new subspecies is Globuligerina oxfordiana calloviensis Gradstein, from the Callovian in the Crimea and Ukraine. A detailed description is provided for one of the historically oldest Jurassic taxa, Conoglobigerina helvetojurassica Haeusler 1881, re-discovered in the Birmenstorfer Schichten of Middle Oxfordian age near Mönthal, Canton Aargau, Switzerland. A neotype is proposed for this taxon. One specimen of C. helvetojurassica may have been attached to a substrate during a later part of its life cycle. The same Birmenstorfer Schichten also yielded two small specimens of an unknown planktonic genus with longitudinal ribs along its pyramidal and probably triserial test. The test is microperforate and wall textures reticulate. The types and type locality of ‘Globuligerina’ stellapolaris Grigelis, described from Northwestern Russia should be carefully investigated, to determine if it is a Late Jurassic or a Late Cenozoic taxon.

Keywords

Portugal Switzerland NW Russia Globuligerina Conoglobigerina Biostratigraphy 

Notes

Acknowledgements

Many earth science colleagues and students have been helpful with creating and executing this taxonomic study: Andrew Gale (Portsmouth, UK), Anna Waskowska and Slawomir Bebenek (Krakow, Poland), Ludmila Kopaevich (Moscow, Russia), Larisa Glinskikh (Novosibirsk, Russia), Algimantas Grigelis (Vilnius, Lithuania), Mike Simmons (Oxford, UK), John and Gregory Whittaker (London, UK), Gabi Ogg (West Lafayette, USA), Walter Etter, Christian Meyer, Michael Knappertsbusch and Evi Bieler (Basel, Switzerland), Maria Rose Petrizzo (Milano, Italy), Brian Huber (Washington, USA), Agnes Görög, (Budapest, Hungary), Giovanni and Vakaré Borgo (Sao Leopoldo, Brazil), Martin Gibling and Darlene van Rijt (Halifax, NS, Canada) and Kate Jarrett (Dartmouth, NS, Canada). I thank them all very much. Chief editor Marty Daniel of the Swiss Journal of Palaeontology and two anonymous reviewers provided much appreciated advice to get the manuscript in final shape for publication.

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Copyright information

© Akademie der Naturwissenschaften Schweiz (SCNAT) 2017

Authors and Affiliations

  1. 1.Natural History MuseumUniversity of OsloOsloNorway
  2. 2.SEES, University of PortsmouthPortsmouthUK

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