Ammonites / Ammonoids
Ammonites / Ammonoids \u2014 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 \u2014 octopus, squid, and cuttlefish \u2014 than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species vanished in the Cretaceous\u2013Paleogene extinction event.
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