Bonapartenykus ultimus

† Bonapartenykus ultimus was a Late Cretaceous alvarezsaurid theropod from the Anacleto Formation of Río Negro Province, Argentina. This small insectivorous carnivore possessed the characteristic single robust forelimb claw of alvarezsaurids, likely used to break into insect colonies. Its fossils include an associated egg clutch, providing rare reproductive data for this bizarre theropod group.

Diet & Feeding

Carnivore

Bonapartenykus ultimus was a meat-eating predator. Carnivorous dinosaurs were active hunters or scavengers, equipped with sharp teeth and claws for catching and consuming prey. They occupied the top of the food chain in their ecosystems.

Time Period

Cretaceous Late Mesozoic Era

Bonapartenykus ultimus 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.