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Baculites Ammonite, from Madagascar (REF:BAM2)

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Baculites Ammonite, from Madagascar (REF:BAM2)Baculites Ammonite, from Madagascar
Late Cretaceous Period, 110 Million Years Old

Measurements Approx.
Height - 2.3 cm
Width - 1.5 cm
Length - 2.7 cm



In this Late Cretaceous genus, only the very earliest part of the shell remained coiled; the latter part grew into a straight shaft. Baculites can occur in vast numbers at some localities, often to the virtual exclusion of the other species, and could grow over a metre in length.


  

The mode of life of these straight ammonites is controversial: some palaeontologists believe that they lived upright in the water, with the tentacles on the sea bed foraging for food; others that they had horizontal orientation and lived nearer the surface of the sea.

  

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