From the album: Middle Jurassic Ammonites from Southern Germany
9cm. From the Sinon Bank in the Wutach area. Murchisonae Zone, Upper Aalenian. It broke into 2 pieces as I was getting it out. Can you see where I repaired it? These were assigned to the genus Staufenia by Rieber in 1963, but Dietze, Rieber etal have revised the genera in December 2014 to the above.