New dinoflagellate cyst species from upper cretaceous subsurface deposits of western Belgium

Eight new dinoflagellate cyst species from the Upper Cretaceous (latest Cenomanian - Late Campanian) of western Belgium are described: Canningia keiemensis (latest Cenomanian - Santonian), Eisenackia? Knokkensis (Campanian), Invertocysta flandriensis (Turonian - Campanian), Microdinium minutum (latest Cenomanian - Santonian), Microdinium? sincfalensis (Turonian - Campanian), Pervosphaeridium elegans (Campanian), Rhynchodiniopsis saliorum (Campanian) and Senoniasphaera palla (Turonian).