Fig. 5 in Short-term survival of ammonites in New Jersey after the end-Cretaceous bolide impact

Fig. 5. Ammonite aptychi (= jaws) in the matrix of the Burrowed Unit. A, D. Lower jaws attributed to Eubaculites. A. AMNH 69496, right valve. D. AMNH 69492, view of right valve (D1), close−up of aptychus at the anterior end (D2). B, C. Lower jaws attributed to Discoscaphites. B. AMNH 69497, left valve. C. AMNH 69498, left valve.