Fossil Ammonite in brass. 1 1/4 without bail x 1 inch. ammonite is sliced in half to show internal growth structure. This listing is for one ammonite, please make selection on right side drop down menu. The name “ammonite”, from which the scientific term is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resemble tightly 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. Often the name of an ammonite genus ends in -ceras, which is Greek (κέρας) for “horn”. Ammonites are an extinct group of marine invertebrate animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e. octopuses, squid, & cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, & the last species died out during the Cretaceous-Paleogene extinction event. Fossil Ammonite Pendant in Brass
