Alvarezsaurus

Alvarezsaurus is a genus of small, bipedal dinosaur that lived during the Late Cretaceous Period, about 75-65 million years ago. It was a small, lightweight dinosaur, with an estimated length of about 3-4 feet and a weight of about 15-20 pounds. Alvarezsaurus had a long, slender neck and a small head with sharp teeth, and it probably had a coat of feathers on its body. It had long, slender legs with three toes on each foot, and it was likely a agile runner.

Alvarezsaurus was discovered in Argentina in the 1980s, and was named by paleontologists in 1988. It is considered a member of the theropod group of dinosaurs, which includes more advanced forms such as Allosaurus and Tyrannosaurus. Alvarezsaurus is known from a number of well-preserved fossil specimens, including several partial skeletons and skulls, which have helped paleontologists learn more about the anatomy and behavior of this dinosaur. It is thought to be closely related to other small theropods such as Coppens spoof and Eustreptospondylus.