Spheroolithus choteauensis

† Spheroolithus choteauensis is a Late Cretaceous ootaxon from the Two Medicine Formation of Montana, USA. These spherical eggs, likely attributable to hadrosaur parents, were laid in colonial nesting grounds in ancient floodplain environments.

Diet & Feeding

Herbivore

Spheroolithus choteauensis 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

Spheroolithus choteauensis 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.