Very nice big ischium from a hadrosaur from the Judith River formation in Montana. It is rare to find big Hadrosaur ischia as complete as this one and in this high quality. However what is most impressive about this fossil are the very nice and multiple Tyrannosaur bite marks on the action close to the basin.

Corythosaurus sp.

Late cretaceous (77 - 74 mil.-y)

Judith River formation, Montana, USA

770 mm - 30.3"

Museum quality