Alvarezsaurus

Alvarezsaurus is a small dinosaur from the Upper Cretaceous of Argentina, about 8683 million years ago. It measured about two meters in length and weighed 20 kilograms. 
It was named by paleontologist Jose Bonaparte in 1991. It walked on two legs, had a long tail, and its leg structure suggests that it was a fast runner. It may have eaten insects. It was more basal than other, better-known, members of its family, such as "Mononykus" and "Shuvuuia".
In popular culture.
"Alvarezsaurus" was featured in the Discovery Channel television series "Dinosaur Planet". It was shown as a predator of young "Saltasaurus", although these species did not exist at the same time. "Alvarezsaurus" lived about five million years before "Saltasaurus".