Ischioceratops

Ischioceratops is known only from a partial skeleton that includes the pelvis, tail bones, and parts of the legs. No skull has been found yet.1

Its ischium (a hip bone) is unlike any other dinosaur's. It flares out in the middle like a recurve bow and has a hole called a fenestra, ending in an axehead-shaped tip.1

Ischioceratops lived during the Campanian stage of the Late Cretaceous, about 83 to 72 million years ago.2

It was a leptoceratopsid, a group of small, hornless, frilled dinosaurs that walked on four legs. Leptoceratopsids are close relatives of the larger horned dinosaurs like Triceratops.1

The fossil was found in the same bonebed as many hadrosaur (duck-billed dinosaur) bones and a tyrannosaur, suggesting a rich ecosystem.1

Ischioceratops had nine sacral vertebrae (hip vertebrae), more than any other known leptoceratopsid.1