Middle Jurassic
Entradasuchus (meaning "Entrada [Sandstone and Ranch] crocodile") is a genus of crocodyliform, an early member of the group including crocodilians. The only known specimen was found in rocks of the Middle Jurassic Entrada Sandstone of Entrada Ranch, Grand County, Utah. Middle Jurassic terrestrial tetrapods are very rare, and "Entradasuchus" was the first unequivocal North American Middle Jurassic nonmarine tetrapod known from body fossils when it was described (1995).