5" Pachycephalosaurus Dome Spikes - Very Rare Find!

This is a very cool, piece collected recently in South Dakota. It is a pair of well preserved dome spikes from Pachycephhlosaurus. Pachycephhlosaurus had a very thick dome atop their skull which was fringed with spikes.

There are two spikes present the larger one measure 2 3/4" long and the smaller 2 1/2" long. The only restoration is some very thin gap fills in the repaired cracks. This is a phenomenal piece, and something like this doesn't come onto the market vey often.

An artists reconstruction of the head of Pachycephalosaurus. By Ryan Steiskal

  • 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 it's skull up to 10 inches thick to cushion it's brain from impacts.

  • Some paleontologists believe this thick skull may have been used for head-butting, much like 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. It's remains have been found in Montana, South Dakota and Wyoming.

  • It was either a herbivore or an omnivore with small leaf shaped teeth which would have been very effective at shredding plants.

  • An artists reconstruction of Pachycephalosaurus. By Jordan Mallon
    Newell, South Dakota
    Hell Creek Formation
    5 x 5", larger spike 2 3/4" long
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