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About: Endocerida     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:Mollusk, within Data Space : dbpedia.org associated with source document(s)

Type: eukaryoteyago:WikicatCephalopodsyago:WikicatOrdovicianAnimalsyago:Animal100015388yago:Cephalopod101968315yago:Invertebrate101905661yago:LivingThing100004258yago:Mollusk101940736yago:Object100002684yago:Organism100004475yago:PhysicalEntity100001930insectyago:Whole100003553yago:WikicatExtinctCephalopodsyago:WikicatExtinctMolluscsyago:WikicatPrehistoricCephalopodsumbel-rc:Mollusk New Facet based on Instances of this Class

Endocerida is an extinct nautiloid order, a group of cephalopods from the Lower Paleozoic with cone-like deposits in their siphuncle. Endocerida was a diverse group of cephalopods that lived from the Early Ordovician possibly to the Late Silurian. Their shells were variable in form. Some were straight (orthoconic), others curved (cyrtoconic); some were long (longiconic), others short (breviconic). Some long-shelled forms like Endoceras attained shell lengths close to 6 metres (20 ft). The related Cameroceras is anecdotally reported to have reached lengths approaching 9 metres (30 ft), but these claims are problematic. The overwhelming majority of endocerids and nautiloids in general are much smaller, usually less than a meter long when fully grown.