Description A mounted Cleoniceras Ammonite, Cretaceous period, Majunga Basin, Madagascar A mounted Cleoniceras Ammonite, Cretaceous period, Majunga Basin, Madagascar, polished displaying articulated suture in honey-coloured amber and brown tones, approximately 27cm diameter, raised on a tapering wooden plinth and gilt metal stand, stamped to underside ‘Tourment Marseille’.