Description
Ammonite BOSTRICHOCERAS BOULEI Cretaceous Campanian, Menabe region, Madagascar. Length: 20 cm Provenance: CHRISTIE'S, Paris, April 16-17, 2008, lot 89. The ammonite undergoes a helical growth when it is juvenile and then in adulthood, the last turn goes back up to the top.
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Ammonite BOSTRICHOCERAS BOULEI Cretaceous Campanian, Menabe region, Madagascar. Length: 20 cm Provenance: CHRISTIE'S, Paris, April 16-17, 2008, lot 89. The ammonite undergoes a helical growth when it is juvenile and then in adulthood, the last turn goes back up to the top.