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- Orthacanthus abstract "Orthacanthus is an extinct genus of fresh-water shark from a family of prehistoric sharks known as xenacanths. Members of the genus had a long spine growing from the back of their skull and a very long dorsal fin, which ran all along its back giving it an eel-like appearance.About 260 million years ago, Orthacanthus was the apex predator of freshwater swamps and bayous in Europe and North America. Its body reached nearly 10 feet (3 meters) in length and owned a peculiar set of double-fanged teeth. They first appeared about 400 million years ago in the Devonian, and became extinct just before the Mesozoic, about 225 million years ago.".
- Orthacanthus class Chondrichthyes.
- Orthacanthus class Elasmobranchii.
- Orthacanthus kingdom Animal.
- Orthacanthus order Xenacanthida.
- Orthacanthus order Euselachii.
- Orthacanthus phylum Chordate.
- Orthacanthus thumbnail Orthacanthus_Vienna.jpg?width=300.
- Orthacanthus wikiPageExternalLink www.whitehavenfossils.co.uk.
- Orthacanthus wikiPageID "1205338".
- Orthacanthus wikiPageRevisionID "601374540".
- Orthacanthus classis Chondrichthyes.
- Orthacanthus familia "Orthacanthidae".
- Orthacanthus fossilRange "Lower Carboniferous - Permian".
- Orthacanthus genus "Orthacanthus".
- Orthacanthus genusAuthority "Agassiz, 1843".
- Orthacanthus hasPhotoCollection Orthacanthus.
- Orthacanthus imageCaption "Fossil in Vienna".
- Orthacanthus imageWidth "250".
- Orthacanthus name "Orthacanthus".
- Orthacanthus ordo "Xenacanthida".
- Orthacanthus phylum Chordate.
- Orthacanthus regnum "Animalia".
- Orthacanthus subclassis Elasmobranchii.
- Orthacanthus subdivision "* Orthacanthus arcuatus * Orthacanthus cylindricus * Orthacanthus senckenbergianus".
- Orthacanthus subdivisionRanks "Species".
- Orthacanthus superordo Euselachii.
- Orthacanthus subject Category:Carboniferous_fish.
- Orthacanthus subject Category:Permian_fish.
- Orthacanthus subject Category:Prehistoric_sharks.
- Orthacanthus type Animal100015388.
- Orthacanthus type AquaticVertebrate101473806.
- Orthacanthus type CartilaginousFish101480516.
- Orthacanthus type Chordate101466257.
- Orthacanthus type Elasmobranch101482071.
- Orthacanthus type Fish102512053.
- Orthacanthus type LivingThing100004258.
- Orthacanthus type Object100002684.
- Orthacanthus type Organism100004475.
- Orthacanthus type PhysicalEntity100001930.
- Orthacanthus type PrehistoricSharks.
- Orthacanthus type Shark101482330.
- Orthacanthus type Vertebrate101471682.
- Orthacanthus type Whole100003553.
- Orthacanthus type Animal.
- Orthacanthus type Eukaryote.
- Orthacanthus type Fish.
- Orthacanthus type Species.
- Orthacanthus type Fish.
- Orthacanthus type Organism.
- Orthacanthus comment "Orthacanthus is an extinct genus of fresh-water shark from a family of prehistoric sharks known as xenacanths. Members of the genus had a long spine growing from the back of their skull and a very long dorsal fin, which ran all along its back giving it an eel-like appearance.About 260 million years ago, Orthacanthus was the apex predator of freshwater swamps and bayous in Europe and North America.".
- Orthacanthus label "Orthacanthus".
- Orthacanthus label "Orthacanthus".
- Orthacanthus label "Orthacanthus".
- Orthacanthus label "Orthacanthus".
- Orthacanthus sameAs Orthacanthus.
- Orthacanthus sameAs Orthacanthus.
- Orthacanthus sameAs m.04h58t.
- Orthacanthus sameAs Q648850.
- Orthacanthus sameAs Q648850.
- Orthacanthus sameAs Orthacanthus.
- Orthacanthus wasDerivedFrom Orthacanthus?oldid=601374540.
- Orthacanthus depiction Orthacanthus_Vienna.jpg.
- Orthacanthus isPrimaryTopicOf Orthacanthus.
- Orthacanthus name "Orthacanthus".