Allosaurus fragilis

(hip bone)

Photo by Mike Brett-Surman

Catalogue number: USNM 2323
Collected in 1888 by Fred Brown in Albany County, Wyoming
Jurassic Period, about 150 million years ago

This is the saurischian (reptile-hipped) pelvis found in sauropods and flesh-eating dinosaurs. It is an example of one of the two kinds of pelvic structures in dinosaurs. The other kind of dinosaur pelvic structure is ornithischian (bird-hipped).

The pelvis shown here is one part of a larger specimen that also provided the jaw for our full exhibit mount of Allosaurus (USNM 4734).

View both pelvic structures