Chasmosaurinae

† Chasmosaurinae is a subfamily of ceratopsid dinosaurs characterised by an elongated, large frill and typically long brow horns, flourishing in the Late Cretaceous of North America. Members include Chasmosaurus, Triceratops, and Torosaurus. These large quadruped herbivores used their parrot-like beaks and shearing cheek teeth to process tough Cretaceous vegetation. The elongated frill likely functioned in species recognition and intraspecific display.

Diet & Feeding

Herbivore

Chasmosaurinae 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

Chasmosaurinae 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.