Swiss Journal of Palaeontology

, Volume 136, Issue 2, pp 187–257 | Cite as

The planktonic foraminifera of the Jurassic. Part I: material and taxonomy

  • Felix GradsteinEmail author
  • Andrew Gale
  • Ludmila Kopaevich
  • Anna Waskowska
  • Algimantas Grigelis
  • Larisa Glinskikh


The taxonomy is modernized and updated for Jurassic planktonic foraminifera using all available literature and stratigraphic series of sediment samples from Canada, Portugal, France, Switzerland, Poland, Lithuania, Russia and Dagestan. The regional stratigraphy of all sampled sections is outlined. Many of the 65–200 µm sample residues yielded well-preserved free specimens, with local assemblages containing up to six species. Thin sections were studied also but do not allow detailed taxonomy. Two genera are described: Globuligerina and Conoglobigerina. Globuligerina probably appeared in the late Toarcian (late Early Jurassic) and Conoglobigerina first occurred in middle Oxfordian (early Late Jurassic). A principal difference between Globuligerina and Conoglobigerina is that the former has a smooth to pustulose wall surface texture and the latter a reticulate wall surface texture. Within the two genera, ten species are described, including from older to younger: Globuligerina dagestanica (Morozova), G. avariformis (Kasimova), G. balakhmatovae (Morozova), G. oxfordiana (Grigelis), G. bathoniana (Pazdrowa), G. jurassica (Hofman), G. oxfordiana (Grigelis) calloviensis Kuznetsova emended, G. tojeiraensis Gradstein, Conoglobigerina helvetojurassica (Haeusler), C. grigelisi Gradstein and C. gulekhensis (Gorbachik and Poroshina). The coarsely perforate ‘Globuligerina’ stellapolaris needs more investigation to establish its identity as a Jurassic or a Late Cenozoic taxon (Gradstein 2017a). Globuligerina balakhmatovae, G. oxfordiana and G. bathoniana occur from Bajocian through early Kimmeridgian, or even Tithonian. Subtle morphological trends may refine stratigraphic usage. Other taxa have shorter stratigraphic ranges. Nineteen plates and ten type species figures detail morphology of all taxa. For key taxa, both the types and specimens from other localities are illustrated.


Jurassic Planktonic foraminifera Globuligerina Conoglobigerina Europe Canada Russia Dagestan 



Christian Meyers, Walter Etter and Michael Knappertbusch (Basel, Switzerland) provided vital scientific and logistical support and hospitality to unravel the ‘mysteries’ around one of the first named taxon of Jurassic planktonic foraminifera–Globigerina helvetojurassica Haeusler from the Birmenstorfer Schichten near Basel, Switzerland. Maria Rose Petrizzo provided quality sample processing for this study and advice on taxonomy; Evi Bieler and Michael Knappertbusch are thanked for the SEM illustrations of Jurassic planktonic foraminifera in the Oesterle collection of the Natural History Museum in Basel. Michele Goulart de Silva and Giovanni Borgo at ITT Fossil, Unisinos, Sao Leopoldo, Brasil also provided major assistance with SEM illustrations. A number of plates with SEM illustrations of taxa are from the thesis of my PhD student B.Stam (†), (Stam 1986) and from Simmons et al. (1997). We thank Mike Simmons and John Whittaker for permission to use their plates. We also thank R.Wernli and A.Görög for reproduction of two small type species figures. Drafting of all figures was skillfully executed by Gabi Ogg (W. Lafayette, USA). Anna Waskowska acknowledges that her participation in the study was supported by KGOiG WGGiOŚ AGH Statutory Founds (AW). 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.

The following colleagues, students and technical staff provided assistance with many thanks: Mike Simmons (Oxford, UK), John and Gregory Whittaker (London, UK), Valery Vuks (St. Petersburg), Temirbekova Umuhayabat Temirbekovna (Makhachkala, Dagestan), Walter Hale (Bremen, Germany), David Watkins (Nebraska, USA), Brian Huber (Washington, USA), Holly Turner (Portsmouth, UK), Martin Gibling and Darlene van de Rijt (Halifax, NS, Canada), Kate Jarrett (Dartmouth, NS, Canada) and Slawomir Bebenek and Alexandra Durek (AGH University, Krakow, Poland).


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Copyright information

© Akademie der Naturwissenschaften Schweiz (SCNAT) 2017

Authors and Affiliations

  • Felix Gradstein
    • 1
    • 2
    Email author
  • Andrew Gale
    • 2
  • Ludmila Kopaevich
    • 3
  • Anna Waskowska
    • 4
  • Algimantas Grigelis
    • 5
  • Larisa Glinskikh
    • 6
  1. 1.Natural History MuseumUniversity of OsloOsloNorway
  2. 2.SEESUniversity of PortsmouthPortsmouthUK
  3. 3.Geological FacultyLomonosov Moscow State UniversityMoscowRussian Federation
  4. 4.AGH Akademia Górniczo-HutniczaKrakówPoland
  5. 5.Academy of SciencesVilniusLithuania
  6. 6.Trofimuk InstituteNovosibirskRussia

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