Seventy-one years prior to the description and naming of Pachycephalosaurus, American paleontologist Joseph Leidy named the new taxon Tylosteus ornatus for a bone fragment interpr

Dec 21, 2025 · Pachycephalosaurus, genus of large and unusual dinosaurs found as fossils in deposits of North America dating to the Late Cretaceous Epoch (about 100 million to 65.5 …

Pachycephalosaurus was an unusual-looking dinosaur. It stood on two legs, had a beak for cropping plants and had a large bony dome on its head surrounded by spikes and bumps.

Nov 21, 2022 · Pachycephalosaurus is an extinct, plant-eating dinosaur that lived about 76 million years ago. Its name, Pachycephalosaurus, which translates to the “thick-headed lizard,” best …

Dec 11, 2025 · The recently acquired skull of the dome-headed dinosaur Pachycephalosaurus. USNM PAL 803273, Department of Paleobiology, Smithsonian Institution. Gift of Eric and …

Oct 18, 2023 · Pachycephalosaurus is a unique dinosaur known for its dome-shaped skull. Learn about its origins, key facts, discovery, and contemporaries.

Pachycephalosaurus walked alongside Triceratops, Ankylosaurus, and Tyrannosaurus rex in what’s now western North America during the Cretaceous period, but all of these animals went …

Oct 10, 2025 · Today Pachycephalosaurus is the type genus of the Pachycephalosauridae,‭ ‬which means that all dinosaur genera similar in form to Pachycephalosaurus are referred to as …

Like other pachycephalosaurids, Pachycephalosaurus was a bipedal herbivore, possessing long, strong legs and somewhat small arms with five-fingered hands.

Known for its distinctive dome-shaped skull, this herbivore lived in North America during the Late Cretaceous period. Reaching around 4.5 meters in length and weighing up to 500 kilograms, it …