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About: Xainzanoceras     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:Species, within Data Space : dbpedia.org associated with source document(s)

Type: ThingEukaryoteAnimalMolluscaanimaleukaryotemolluscaspecies New Facet based on Instances of this Class

Xainzanoceras is a genus of nautiloid cephalopods from the Upper Ordovician of China, assigned to the tarphyceratid family Lituitidae. The type, Xainzanoceras xizangense Chen resembles the ophidioceratid genus Ophioceras. The shell is evolute, discoidal, ; whorl section rounded, covered with thick, straight, close spaced, radial ribs that curve slightly forward at the ventral margin where they become quickly reduced or lost.