Articles | Volume 35, issue 2
J. Micropalaeontol., 35, 205–228, 2016
https://doi.org/10.1144/jmpaleo2015-035
J. Micropalaeontol., 35, 205–228, 2016
https://doi.org/10.1144/jmpaleo2015-035

  04 Jul 2016

04 Jul 2016

Middle Jurassic Tethyan–Boreal ostracod faunal links: a case study from the Callovian of Portugal

Vanessa Pais1, Maria Cristina Cabral2, Alan Lord3, Ana Cristina Azerêdo2, and Liam Gallagher4 Vanessa Pais et al.
  • 1Departamento de Geologia, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, C6, 4° piso, 1749–016 Lisboa, Portugal
  • 2Departamento de Geologia and Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, C6, 4° piso, 1749–016 Lisboa, Portugal
  • 3Senckenberg Forschungsinstitut, Senckenberganlage 25, D-60325 Frankfurt-am-Main, Germany
  • 4Network Stratigraphic Consulting Ltd, Harvest House, Cranborne Road, Potters Bar, Hertfordshire EN6 3JF, UK

Keywords: Callovian, Lusitanian Basin, ostracod taxonomy, calcareous nannofossil biostratigraphy, palaeobiogeography

Abstract. Late Callovian (athleta Chronozone) age sediments of Pedrógão, west coast Portugal, yielded a low diversity ostracod assemblage with relatively little in common with coeval NW European assemblages except at the weak level of comparative (cf.) species identification. Five new marine species are described (Neurocythere multiforma sp. nov., Palaeocytheridea (Malzevia)? dorsocostata sp. nov., Praebythoceratina parascrobiculata sp. nov., Praeschuleridea lisensis sp. nov., Virgulacytheridea posteroacuminata sp. nov.) and three previously described non-marine species recorded that so far are indigenous to Portugal (Septacandona azeredae, Sinuocythere pedrogaensis, Theriosynoecum helmdachi). Ostracod taxonomic links to western Tethys are evident but weak. Calcareous nannofossil assemblages were analysed for biostratigraphical control.

Supplementary material: Sample data and raw ostracod counts are available at https://doi.org/10.6084/m9.figshare.c.3271394.v1