Fossil Ammonites & Orthocones Cluster | Kazakhstan

Medlicottia orbignyana & Uraloceras sp. ammonites Orthocone cephalopods Lower Permian, Artinskian Stage (~290-283 mya) Aktobe Region, Kazakhstan   Specimen approx. size: 5.75" x 3" x 1.75" Medlicottia approx. size: 2.25" x 2" Uraloceras approx. size: 1.5" x 1.25" This specimen features shells of multiple cephalopods, with a focus on the larger Medlicottia orbignyana and the slightly smaller Uraloceras ammonites. Most of the outer shells of these ammonites have worn away, revealing the fascinating patterns of the inner shell sutures.   Ammonoids are a group of extinct marine mollusk animals in the subclass Ammonoidea of the class Cephalopoda. These mollusks, 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 vanished in the Cretaceous–Paleogene