Dinoflagellate cyst stratigraphy of the Miocene Hodde and Gram Formations, Denmark

Abstract

A dinoflagellate cyst stratigraphy is proposed for the Hodde and Gram Formations in western Jylland, Denmark. Four biozones are defined and the formations are dated by dinoflagellate cysts to be of Middle and Upper Miocene age, which supports previous dating by molluscs. One new genus and four new species are described: Labyrinthodinium truncatum gen. nov. sp. nov., Dinopterygium verricu/um sp. nov., Ap-teodinium tectatum sp. nov. and Nematosphaeropsis aquaeducta sp. nov.