Xiyunykus pengi

† Xiyunykus pengi is an Early Cretaceous alvarezsauroid from Xinjiang, China, an important transitional form in alvarezsaurid evolution. Its forelimb retains more ancestral features than later alvarezsaurids, documenting the gradual reduction to a single digging claw.

Diet & Feeding

Carnivore

Xiyunykus pengi 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 Early Mesozoic Era

Xiyunykus pengi lived during the Cretaceous Early period of the Mesozoic Era, approximately 145.0 to 100.5 million years ago.

The Cretaceous saw continued dinosaur evolution with the rise of ornithopods and early ceratopsians. Flowering plants first appeared and began to transform terrestrial ecosystems. Spinosaurus and other large theropods lived during this time.