The chronology of dinosaur oospecies in south-western Europe: Refinements from the Maastrichtian succession of the eastern Pyrenees

► Parataxonomical and stratigraphic studies enable to establish a robust oospecies succession. ► Successive occurrence of three megaloolithid oospecies. ► Precise correlation with the magnetic polarity time scale. ► Replacement of M. siruguei with M. mamillare occurs around the reversal of C31r-C31n. ► Age calibration for replacement is confirmed.