I've a large metacarpal that i'm sure if from a Tyrannosaurus, however, i'm not certain of the species. i found it in the Judith formation in the Montana Milk River Badlands just a mile or so south of Alberta. it measures 6 3/4" long, 3" tall and 3 1/4" across, but i don't think that information is important in the ID. Any help in ID even of where in the foot it's from would be appreciated.