Eutretauranosuchus is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of goniopholidid

Goniopholididae

Goniopholididae is an extinct family of moderate-sized semi-aquatic crocodyliforms similar to living crocodiles. They lived between the Early Jurassic and the Late Cretaceous.-Geographical distribution:...

 mesoeucrocodylia

Mesoeucrocodylia

Mesoeucrocodylia is the name of the clade that includes Eusuchia and the paraphyletic group Mesosuchia. The group appeared during the Early Jurassic, and continues to the present day....

n. It is known from several specimens collected from the Late Jurassic

Late Jurassic

The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.2 ± 4.0 to 145.5 ± 4.0 million years ago , which is preserved in Upper Jurassic strata. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age...

-age Morrison Formation

Morrison Formation

The Morrison Formation is a distinctive sequence of Late Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish...

, including fossil

Fossil

Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

s from Garden Park

Garden Park, Colorado

Garden Park, in southcentral Colorado, is known for its Jurassic dinosaurs and the role the specimens played in the infamous bone wars of the late 19th century. Located north of Cañon City, Colorado, the name originates from the area providing vegetables to the miners at nearby Cripple Creek in...

 and Dry Mesa Quarry

Dry Mesa Quarry

The Dry Mesa Dinosaur Quarry is situated in southwestern Colorado, USA, near the town of Delta. Its geology forms a part of the Morrison Formation and has famously yielded a great diversity of animal remains from the Jurassic Period, among them Ceratosaurus, Supersaurus, and Torvosaurus...

 in Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

 and Como Bluff

Como Bluff

Como Bluff is a long ridge extending east-west, located between the towns of Rock River and Medicine Bow, Wyoming. The ridge is an anticline, formed as a result of compressional geological folding. Three geological formations, the Sundance, the Morrison, and the Cloverly Formations, containing...

 in Wyoming

Wyoming

Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

. The type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the 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

Cleveland Museum of Natural History

The Cleveland Museum of Natural History is a natural history museum located approximately five miles east of downtown Cleveland, Ohio in University Circle, a 550-acre concentration of educational, cultural and medical institutions...

. This individual was only about 1.77 metres (5.8 ft) long, and weighed perhaps 18 kilograms (39.7 lb), but older individuals could reach substantially larger sizes. The skull of Eutretauranosuchus differed from that of contemporaneous Goniopholis

Goniopholis

Goniopholis is an extinct genus of crocodyliform that lived in North America, Europe and Asia during the Late Jurassic and Early Cretaceous. Being semi-aquatic it is very similar to modern crocodiles...

by the presence of an additional opening in the palate

Palate

The palate is the roof of the mouth in humans and other mammals. It separates the oral cavity from the nasal cavity. A similar structure is found in crocodilians, but, in most other tetrapods, the oral and nasal cavities are not truly separate. The palate is divided into two parts, the anterior...

, among other details. Eutretauranosuchus would have been a semiaquatic predator, its prey including fish and small to medium-sized terrestrial vertebrates.