Multiblock 2

Costileioceras sinon(9cm.) on the right, with Ancolioceras opalinoides. Upper Aalenian, Achdorf Formation, Murchisonae Zone, Sinon Bank. From the Wutach Valley. These were assigned to the genus Staufenia by Rieber in 1963, but Dietze, Rieber etal have revised the genera in December 2014.