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

Late Callovian (athleta Chronozone) age sediments of Pedrogao, 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