SPINOSAURUS CAUDAL VERTEBRAE- BEAUTIFUL PRESERVATION À PARIS

spinosaurus caudal vertebrae- beautiful preservation. État : "Occasion" Beautiful and rare chocolate coloured preservation- one side suject to surface weathering which enhances the aesthetics. H: 10.5 cms max length: 10 cms diagonal 13cms  "The elongate neural and haemal arches result in a tail shape that is markedly vertically expanded and has an extensive lateral surface area. The highly specialized morphology of the Spinosaurus tail allowed it to function as a propulsive structure for aquatic locomotion. The anterior positioning of the center of mass within the ribcage may...."