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Temporal range: Eocene, 55–40Ma
Dyrosaurus mount.jpg
Restored skeleton
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Crocodylomorpha
Family: Dyrosauridae
Genus: Dyrosaurus
Pomel, 1894
  • D. phosphaticus (Thomas, 1893) (type)
  • D. maghribensis Jouve et al., 2006
Jaw and other fragments

Dyrosaurus was an extinct genus of marine dyrosaurid crocodyliform from the Eocene of North Africa. It was a large animal, reaching 6 meters in size. The type species D. phosphaticus possessed slender jaws with numerous recurved teeth, indicative of a primarily fish diet (similar to the extant gharial). Dyrosaurus teeth have smooth enamel and are long and often sharp, helping it to hunt fast-moving prey. French paleontologist Auguste Pomel named the genus in 1894 for Djebel Dyr, a mountain near Tebessa in Algeria, where its fossil vertebrae were found in a phosphate mine. Other remains had been found earlier in another phosphate mine in Tunisia and described as Crocodylus phosphaticus Thomas, 1893, which became the type species.


  • Buffetaut E. 1985. L'évolution des crocodiliens. Les animaux disparus-Pour la science, Paris, p. 109
  • Pomel, A. N. 1894. Découverte de Champsosauriens dans les gisements de phosphorite du suessonien de l'Algérie. Comptes Rendus de l'Académie des Sciences,118 : 1309-1310.