Sphaerotholus triregnum

† Sphaerotholus triregnum is a Late Cretaceous pachycephalosaur from the United States, with an especially rounded dome compared to related species. The specific epithet refers to its dome's appearance bearing three separate fused regions.

Diet & Feeding

Herbivore

Sphaerotholus triregnum was a plant-eating dinosaur. Herbivores typically fed on ferns, cycads, conifers, and other vegetation available during their era. Many herbivorous dinosaurs developed specialized teeth and digestive systems for processing tough plant material.

Time Period

Cretaceous Late Mesozoic Era

Sphaerotholus triregnum lived during the Cretaceous Late period of the Mesozoic Era, approximately 100.5 to 66.0 million years ago.

The final age of dinosaurs, featuring iconic species like Tyrannosaurus rex, Triceratops, and Velociraptor. Dinosaurs reached their peak diversity before the catastrophic asteroid impact at the Chicxulub crater ended the Mesozoic Era.