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Saurolophus

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Saurolophus (pron.: /sɔːˈrɒləfəs/; meaning "lizard crest") is a genus of large hadrosaurine duckbill that lived about 69.5-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back from the skull. At 40 feet (12 metres), Saurolophus was one of the larger of the hadrosaur family. Saurolophus was an herbivorous dinosaur which could move about either bipedally or quadrupedally.

The type species, S. osborni, was described by Barnum Brown in 1912 from Canadian fossils. A second valid species, S. angustirostris, is represented by numerous specimens from Mongolia, and was described by Anatoly Konstantinovich Rozhdestvensky. A third species, S. "morrisi" from California, was a nomen nudum as of 2011, and a fourth species, S. kryschtofovici from China, is considered dubious.

Description

Saurolophus (pron.: /sɔːˈrɒləfəs/; meaning "lizard crest") is a genus of large hadrosaurine duckbill that lived about 69.5-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back from the skull. Saurolophus was an herbivorous dinosaur which could move about either bipedally or quadrupedally. The type species, S. osborni, was described by Barnum Brown in 1912 from Canadian fossils. A second valid species, S. angustirostris, is represented by numerous specimens from Mongolia, and was described by Anatoly Konstantinovich Rozhdestvensky. A third species, S. "morrisi" from California, was a nomen nudum as of 2011, and a fourth species, S. kryschtofovici from China, is considered dubious.

Classification

Barnum Brown, who described the first specimens, put it in its own subfamily in "Trachodontidae" (=Hadrosauridae), the Saurolophinae. At the time, this also featured Corythosaurus and Hypacrosaurus, the only well-known examples of what would become Lambeosaurinae.[1] Brown thought that Saurolophus had an enlarged tip to the ischium in the hip, as dinosaurs now seen as lambeosaurines had, but this seems to have been based on a wrongly associated lambeosaurine ischium. Also, he confused the crests of Saurolophus and lambeosaurines as being made of the same bones.[2]

Most publications before 2010 classified Saurolophus as a member of Hadrosaurinae, often known colloquially as the "flat-headed hadrosaurs". In 2010, the subfamily Saurolophinae was brought back to use since Hadrosaurus seem sto have branched off prior to the "hadrosaurine"–lambeosaurine split. As a result, Hadrosaurinae by definition can't include the traditional "hadrosaurines". Saurolophinae is the oldest available name for the former "hadrosaurine" clade.[3] Saurolophus, as the name suggests, is a saurolophine, as it has a saurolophine pelvis and a (largely) solid crest.

In Other Media

Saurolophus made videogame appearances in Dinosaur King and Fossil Fighters series. It is also featured in the Walking with Dinosaurs special: The Giant Claw.

References

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External links


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