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Alectrosaurus olseni

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"mateless lizard"

Describer Gilmore, 1933
Also Known As --
Type of Species olseni
Order Saurischia
SubOrder Theropoda
InfraOrder --
Micro-Order --
Family Tyrannosauridae
Size 25-30 feet (8-10 meters) long
Period Late Cretaceous, 98-88 million years ago
Fossilsite Mongolia, China
Diet Carnivore

Alectrosaurus olseni was a large carnivore that has puzzled many scientists for many years. Although the leg bones resembled those of tyrannosaurids such as Albertosaurus and Torvosaurus, the arm bones were much larger than those of other tyrannosaurids. Alectrosaurus had a long, toothy skull. Its snout was smooth on top, rather than rough and bumpy as in later tyrannosaurids.

Alectrosaurus olseni
Image courtesy of Gabriel Lio