12.4" Fossil Pachycephalosaurus Femur - Montana

This is a 12.4" long femur of the dinosaur Pachycephalosaurus ("thick headed lizard"). It was collected from the Hell Creek Formation in Glendive, Montana. This femur comes with a metal display stand. When displayed on the stand, the entire specimen is 13.2" tall.

There are several repaired cracks throughout this bone, however the restoration is minimal with some gap fill scattered throughout some of the cracks.

Pachycephalosaurus was a medium-sized herbivorous bipedal dinosaur from the Late Cretaceous in North America, most notably in the Hell Creek Formation. Pachycephalosaurus is a genus that has had much controversy taxonomically. The two contemporaneous genera Stygimoloch and Dracorex have undergone much scrutiny to determine whether they are valid species or if they are actually juvenile growth stages of Pachycephalosaurus. Most current consensus suggests that they are, making Pachycephalosaurus the predominant Pachycephalosaur of the Hell Creek Formation.

  • Pachycephalosaurus was a bipedal dinosaur that lived during the Late Cretaceous period and probably was about 15 feet in length.

  • Pachycephalosaurus had a distinctive large, bony dome on top of its skull up to 10 inches thick to cushion its brain from impacts.

  • Some paleontologists believe this thick skull may have been used for head-butting, much like modern rams, while others contend it may have been a sexual display.

  • It was one of the last non-avian dinosaurs before the K-T extinction event, 65 million years ago.

  • There is only one known species of Pachycephalosaurus, Pachycephalosaurus wyomingensis. Its remains have been found in Montana, South Dakota, and Wyoming.

  • It was either an herbivore or omnivore with small leaf-shaped teeth effective for shredding plants.

  • An artist's reconstruction of Pachycephalosaurus. By Jordan Mallon
    An artist's reconstruction of Pachycephalosaurus. By Jordan Mallon
    Glendive, Montana
    Hell Creek Formation
    12.4" long, 13.2" tall on metal stand
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