Ancolioceras opalinoides (Mayer 1864)
10cm. in circumference. Another recent find from the upper Aalenian in 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 to the above.
From the album:
Middle Jurassic Ammonites from Southern Germany
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