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About: Hybodontiformes     Goto   Sponge   NotDistinct   Permalink

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

Type: yago:Animal100015388yago:AquaticVertebrate101473806yago:CartilaginousFish101480516yago:Chordate101466257yago:Elasmobranch101482071yago:Fish102512053yago:LivingThing100004258yago:Object100002684yago:Organism100004475yago:PhysicalEntity100001930programming languageyago:Shark101482330yago:Vertebrate101471682yago:Whole100003553yago:WikicatExtinctSharksumbel-rc:Fish New Facet based on Instances of this Class

Hybodontiformes, commonly called hybodonts, are an extinct group of shark-like chondrichthyans, which existed from the late Devonian to the Late Cretaceous. They form the group of Elasmobranchii closest to neoselachians, the clade of modern sharks and rays. Hybodonts were named and are distinguished based on their conical tooth shape. They are also noted for the presence of a spine on each of their two dorsal fins. They were abundant in marine and freshwater environments during the late Paleozoic and early Mesozoic, but were rare in open marine environments by the end of the Jurassic, having been largely replaced by modern sharks, though they were still common in freshwater and marginal marine habitats. They survived until the end of the Cretaceous, before going extinct.