Paleobiota of The Morrison Formation - Crurotarsans

Crurotarsans

Crocodiles of a variety of sizes and habitats were common Morrison animals. Cursorial mesosuchians, or small terrestrial running crocs, included Hallopus victor and "Fruitachampsa callisoni". More derived crocodilians included Goniopholis felix (common), G. gilmorei, G. lucasi, G. stovalli, Hoplosuchus kayi, and Macelognathus vagans.

Color key
 Notes
Uncertain or tentative data are in ; crossed out data are discredited.
Name Species State Member Material Notes Images

Eutretauranosuchus

E. delfsi
  • Colorado
  • Wyoming

"Fruitachampsa"

"F. callisoni"
  • Colorado
  • Brushy Basin Member

Goniopholis

G. felix
  • Colorado

G. gilmorei
  • Wyoming

G. lucasii
  • Colorado

G. stovalli
  • Oklahoma

Hallopus

H. victor
  • Colorado

Hatcherichnus

H. sanjuanensis
  • Colorado
  • Utah

  • Utah
  • Wyoming
  • Saltwash Member

Hoplosuchus

H. kayi
  • Utah

Macelognathus

M. vagans
  • Colorado
  • Wyoming

Read more about this topic:  Paleobiota Of The Morrison Formation