A Photographic Atlas of the Pes from a Hadrosaurine Hadrosaurid Dinosaur


  • Rachel Zheng The Webb Schools, 1175 West Baseline Road, Claremont, CA 91711
  • Andrew A Farke Raymond M. Alf Museum of Paleontology, 1175 West Baseline Road, Claremont, CA 91711
  • Gy-Su Kim The Webb Schools, 1175 West Baseline Road, Claremont, CA 91711


foot, Osteology, Pes, Hadrosaur, Hell Creek Formation


Hadrosaurid dinosaurs are abundantly represented in terrestrial deposits from the Late Cretaceous, as isolated elements, associated specimens, and articulated skeletons with soft tissue. However, identifi cation of isolated elements can be diffi cult in the absence of adequate reference material. Here we present a photographic atlas of the complete pes from a hadrosaurine hadrosaurid (possibly Edmontosaurus annectens) collected in the Hell Creek Formation of Montana.

Right tarsals from a hadrosaurid dinosaur, RAM 7150. The astragalus is shown in A) proximal, B) distal, C) posterior, G) medial, H) lateral, and L) anterior views. The calcaneum is shown in D) proximal, E) distal, F) posterior, J) medial, K) lateral, and I) anterior views. The astragalus/calcaneum pairs in A-F and I-L are shown with a slight separation between their contacting surfaces, and the arrows indicate anatomical directions for each pair. M-R) tarsal IV; M and P show proximal and distal views, respectively; the precise orientation of the other views is not known due to disarticulation of the tarsal from the metatarsals after preparation. Photography by the authors. Courtesy of RAM