The molluscan fauna of the Eocene Lillebælt Clay, Denmark

For the first time the molluscan fauna of the latest Ypresian-early Lutetian Lillebælt Clay Formation of Denmark is treated monographically. The assemblage yielded 75 species. Four new species and one new subspecies are introduced, viz. Astarte filigera treldensis n. subsp., Abra madseni n. sp., Thracia barsoei n. sp., Galeodea anderseni n. sp. and Desorinassa tonneseni n. sp. The molluscan assemblage contains species known from different stratigraphic levels of the British Eocene, where the Lillebaslt Clay correlates with the Bracklesham Group, based on micropalaeontological and magnetostratigraphical data. The molluscan fauna suggests water depths during deposition to have ranged from lower sublittoral to upper bathyal, probably 100-300 m.