Article: The distribution of the dinoflagellate Wetzeliella in the Palaeogene of north-western Europe
The stratigraphical distribution of Wetzeliella in England, Belgium, and north Germany is reviewed. A very similar succession of species in these areas permits the establishment of eight Wetzeliella zones ranging from the late Upper Palaeocene to the Oligocene. Correlation based on Wetzeliella in north-west Europe is in agreement with that founded on calcareous nannoplankton. The zonation proposed for north-west Europe can be made to correspond with similarly based schemes established for the Upper Palaeocene-Lower Eocene of the southern Pyrenees (north-east Spain) and for the Palaeogene of the Alpine flysch (east France). In the Systematic Appendix, a new subgenus: W. (Apectodinium) and two new species: W. (Apectodinium) paniculata and W. (W.) gochtii, are introduced.