Tuesday, September 24, 2013


 Ammonites first appeared about 400 million years ago during the Devonian period and died out about the same time as dinasaurs during the Cretaceous–Paleogene extinction event.
These molluscs are more closely related to octopuses, squid, and cuttlefish than they are to the living Nautilus species. The name "ammonite" came from the spiral shape of their fossilized shells, which look a bit like coiled rams' horns. Pliny the Elder (d. 79 AD near Pompeii) called fossils of these animals ammonis cornua ("horns of Ammon") because the Egyptian god Ammon (Amun) was typically depicted wearing ram's horns.

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