Alligaticeras alligatum (Leckenby 1859)
By Ludwigia
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No, it's not an alligator. At any rate , it's an early representative of the family Perisphinctidae. 5.5cm. Found recently in Ueken, Swiss Jura in the turbulent border crossover layers between Mid(Callovian) and Upper(Oxfordian) Jurassic. Cordatus/Lamberti zones.
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From the album:
Late Jurassic Ammonites from Southern Germany
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