Dinosaur: Polyonax mortuarius
Cretaceous: 72.1–66 Ma
Period
Epoch: Late Cretaceous
Stage: Late Maastrichtian
Years: 72.1–66 Ma
Details
Status: nomen dubium
Author: Cope
Year: 1874
Distribution
Area: North America
Country: USA
Region: Colorado
Formation: Laramie
Sources
Material: 3 dorsal vertebrae, limb bone fragments and horn core fragments (subadult).
References: Glut, (1997). Dinosaurs - The Encyclopedia.
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