Ammonites refractus, Print, Ammonoidea, Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out in the Cretaceous–Paleogene extinction event.
Keywords:
Ammonites refractus, Print, Ammonoidea, Ammonoids, group, extinct marine mollusc animals, subclass Ammonoidea, class Cephalopoda, molluscs, commonly referred, ammonites, closely related, living coleoids, i.e, octopuses, squid, cuttlefish, shelled nautiloids, living Nautilus species, earliest ammonites, Devonian, last species died out, Cretaceous–Paleogene extinction event
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