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Volume 37, issue 1 | Copyright
J. Micropalaeontol., 37, 195-201, 2018
https://doi.org/10.5194/jm-37-195-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 23 Jan 2018

Research article | 23 Jan 2018

Two new bairdiid ostracod species from the early Barremian–Hauterivian of the northern and central North Sea to the Atlantic margin off Norway

Michael Ayress and Tom Gould Michael Ayress and Tom Gould
  • RPS Ichron, Gadbrook Business Centre, Northwich, Cheshire CW9 7TL, UK

Abstract. Two new species of bairdiid Ostracoda are described from the lower Barremian – Hauterivian interval of the Valhall and Åsgard formations in the northern and central North Sea and Atlantic margin off Norway. The new species are Pontocyprella valhalla (lsid:zoobank.org:act:CA6B273F-CFF6-4C38-B9F4-18188225A711, 18 January 2018) and Bairdia asgarda (lsid:zoobank.org:act:4A4DC817-A028-45FB-9287-ABF3794F2FCB, 18 January 2018). These species dominate the ostracod assemblage that occurs abundantly in early Barremian–Hauterivian deep marine sediments of the northern and central North Sea and Haltenbanken area off Norway. Pontocyprella valhalla is restricted to this interval and because of its large size and distinct shape is a useful stratigraphic marker species, its last appearance being within the early Barremian.

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Two new ostracod crustaceans are described from fossil shells found in muddy sediments deposited in deep water during Lower Cretaceous. These mud sediments are known as the Valhall and Åsgard formations and are found in the northern and central North Sea and Atlantic margin off Norway. The new species are named Pontocyprella valhalla and Bairdia asgarda after the formation names. The microfossil research was conducted to bring to light new finds of an otherwise overlooked group of fossils.
Two new ostracod crustaceans are described from fossil shells found in muddy sediments deposited...
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