Edmontonia

Say it like this: “ed-mon-TOHN-ee-a”

Edmontonia longiceps

Edmontonia ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Canada.

Quiz me on Edmontonia

When: Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
Named in: 1928 · Sternberg, C. M.
Hip height: 1.5 m · 5 ft
Length: 6.6 m · 22 ft
Weight: 350 kg · 772 lb
Found in: Canada · Horseshoe Canyon
Food and walking: Herbivore · Four legs
Kind: armored dinosaur · Ankylosaur
Family branch: Nodosauridae

The story in short

The genus Edmontonia dates to 1928, the year C. M. Sternberg described it. The name honors a person tied to the fossil or its study.

Fossils referred to Edmontonia date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Canada, including the Horseshoe Canyon Formation. It was a herbivore and walked on four legs.

Published estimates put Edmontonia at a length near 6.6 m, hips about 1.5 m high, and a body mass around 350 kg.

On the family tree it sits in Nodosauridae, among the armored dinosaurs.

Close relatives

Acantholipan

Acantholipan gonzalezi

Late Cretaceous (Santonian) · roughly 85.7 to 83.6 million years ago

Animantarx

Animantarx ramaljonesi

Late Cretaceous (Cenomanian) · roughly 100.5 to 93.9 million years ago

Anoplosaurus

Anoplosaurus curtonotus

Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago