Dinosaurs A to Z
Ankylosauridae

Oohkotokia horneri oh.ohkuh-TOHKEEUH

"large stone"

Generic ankylosaur body-plan outline
You 1.8 m (5.9 ft) tall
Oohkotokia 5 m (16.4 ft) long
as long as 3 people standing fingertip to fingertip
generic ankylosaur body plan, scaled to length — not a silhouette of Oohkotokia
Length
5 m (16.4 ft)
Period
Late Cretaceous (74 Mya)
Place
United States · Alberta, Canada · Montana, USA
Food
Herbivore
Clade
Ankylosauridae Dinosauria Ornithischia Thyreophora Ankylosauria Club-tailed armored herbivores.

Oohkotokia ( ) is a genus of ankylosaurid dinosaur within the subfamily Ankylosaurinae. It is known from the upper levels of the Two Medicine Formation (late Campanian stage, about 74 Ma ago) of Montana, United States. The discovery of Oohkotokia supports that Ankylosaurine dinosaurs existed and flourished continuously in Montana and/or Alberta throughout the late Campanian and early Maastrichtian stages in the Late Cretaceous period. It was a large, heavily built, quadrupedal, herbivore, that could grow up to 5 m long and weigh up to 2 MT.

What we know

  • Named by Penkalski, 2013.
  • Body length estimated at about 5 m.
  • Fossils found in United States and Alberta, Canada.

What we guess

The reconstruction notes for Oohkotokia — soft tissue, color, behavior — haven't been written up yet. Only the recorded basics above are filled in so far.