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Deinosuchus hatcheri
Deinosuchus skull.jpg
Scientific Classification

Deinosuchus is a huge crocodilian found only in fossilized form. A 1954 find noted that the lower jaw was probably 1800mm (six feet)in length, and giving the full length of the animal as probably about 50 feet (15 meters).[1] It was at first known as Phobosuchus, but later the name stabilized as deinosuchus. In his preface, David Schwimmer notes that the characteristics such as snout constriction that identify a modern animal as a crocodile and not an alligator should not be applied, so that this animal should only be termed crocodilian.[2]


Fossils of Deinosuchus can sometimes be confused with fossil remains of a marine crocodile known as Thoracosaurus.[3]



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  1. A Gigantic Crocodile from the Upper Cretaceous Beds of Texas BY EDWIN H. COLBERT AND ROLAND T. BIRD, American Museum Novitates, Number 1688, Nov 12, 1954.
  2. King of the crocodylians: the Paleobiology of Deinosuchus, By David R. Schwimmer. Indiana University Press, 2002.
  3. THE GIANT CROCODYLIAN DEINOSUCHUS FROM THE UPPER CRETACEOUS OF THE SAN JUAN BASIN, NEW MEXICO by Lucas, S. G. and Sullivan, R.M., eds., 2006, Late Cretaceous vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35.

See Also