Palaeoenvironmental analysis of Cenomanian-Turonian dinocyst assemblages from the Castilian Platform (Northern-Central Spain)

► The palynological assemblages (pollen/spores and dinocyst) from three Cenomanian-Turonian sections from the Castilian Platform are described. ►Dinocyst assemblages show significant differences according to their relative palaeogeographical locations.► Xenascus ceratioides, Cribroperidinium exilicristatum, Canningia reticulata and Kallosphaeridium? ringnesiorum show inner neritic preferences. ► Palaeohystrichophora infusorioides, Spiniferites spp., Odontochitina spp., Trichodinium castanea and Impletosphaeridium polytrichum show outer neritic preferences.► In the Castilian Platform, the Cenomanian-Turonian Boundary Event (CTBE) may be manifested by a higher proportion of Cyclonephelium spp. in the distal dinocyst assemblages.