Tiny T-Rex

A new species of predatory tyrannosauroid dinosaur that lived about 92 million years ago (Cretaceous period) has been identified from fossils found in New Mexico. The new dinosaur, named Suskityrannus hazelae, was a tiny relative of Tyrannosaurus Rex, about 9 feet (2.7 m) long and 3 feet (0.9 m) tall at the hip.

The ancient creature weighed between 20 and 41 kg, compared to a Tyrannosaurus Rex’s weight of up to 9 tons. Its diet likely consisted of the same kind as its larger meat-eating counterpart, with Suskityrannus hazelae likely hunting small animals.

An artist’s rendering of how Suskityrannus hazelae may have looked. Image credit: Andrey Atuchin.

Suskityrannus hazelae offers a glimpse into the evolution of tyrannosaurs just before they took over the planet. It also belongs to a dinosaurian fauna that just proceeds the iconic dinosaurian faunas in the late Cretaceous that include some of the most famous dinosaurs such as Triceratops, predators like Tyrannosaurus Rex, and duckbill dinosaurs like Edmontosaurus.

Two partial skeletons of Suskityrannus hazelae were found in the 1990s during expeditions to the Zuni Basin in western New Mexico.

The find links the older and smaller tyrannosauroids from North America and China with the much larger tyrannosaurids that lasted until the final extinction of non-avian dinosaurs.

The findings were published in the journal Nature Ecology & Evolution.

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