Late Bathonian to Early Oxfordian dinoflagellate cyst stratigraphy of Jameson Land and Milne Land, East Greenland

The stratigraphic distribution of Upper Bathonian to early Middle Oxfordian dinoflagelIate cysts from localities in Jameson Land and in Milne Land, East Greenland, is evaluated. Using the range of selected species, their earliest appearances andlor extinction, six dinoflagelIate cyst zones and five subzones are proposed for the upper Middle and lower Upper Jurassic succession of central East Greenland. The proposed zonation scheme is correlated with the ammonite zonation of the investigated interval. Two new species, Chytroeisphaeridia grossa sp. nov. and Escharisphaeridia laevigata sp. nov. are formally described.