New biostratigraphic data on an Upper Hauterivian-Upper Barremian ammonite assemblage from the Dolomites (Southern Alps, Italy)

► Ammonite fauna is described for the first time from the Southern Alps (e.g., Dolomites). ► A typical Mediterranean assemblage was detected. ► Ammonite abundance peaks occur in the C. krenkeli Zone and the G. sartousiana Zone. ► Hauterivian is dominated by Pseuthurmannia-Crioceratites-Plesiospitidiscus, Barremian by Kotetishvilia-Melchorites-Silesites. ► Ammonite abundances are clearly linked to sea-level changes from Late Hauterivian to mid Late Barremian times.