The name
means "
Utah's predator" or "
Utah thief" is the largest known member of the theropod dinosaur family Dromaeosauridae, and dates from the early Cretaceous period (about 124 million years ago).
The first specimens of Utahraptor were found in 1975 by Jim Jensen in the Dalton Wells Quarry in east-central
Utah, near the town of
Moab.