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Temporal range: Late Jurassic
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Goniopholididae
Genus: Eutretauranosuchus
Mook, 1967
Type species
Eutretauranosuchus delfsi
Mook, 1967

Eutretauranosuchus is a genus of goniopholidid mesoeucrocodylian. It is known from several specimens collected from the Late Jurassic-age Morrison Formation, including fossils from Garden Park and Dry Mesa Quarry in Colorado and Como Bluff in Wyoming. The type species is E. delfsi. Charles Mook described Eutretauranosuchus in 1967 from a skull and partial skeleton of a subadult individual uncovered at Garden Park in the 1950s by workers from the Cleveland Museum of Natural History. This individual was only about 1.77 metres (5.8 ft) long, and weighed perhaps 18 kilograms (40 lb), but older individuals could reach substantially larger sizes. The skull of Eutretauranosuchus differed from that of contemporaneous Goniopholis by the presence of an additional opening in the palate, among other details. Eutretauranosuchus would have been a semiaquatic predator, its prey including fish and small to medium-sized terrestrial vertebrates.[1]


  1. ^ Foster, John (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Bloomington, Indiana: Indiana University Press. pp. 152–153. ISBN 978-0-253-34870-8. OCLC 77830875.