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Allosaurus is a species of theropod dinosaur from the Jurassic. It appeared in four Sunday strips and a story arc.

Ultrasauros escape

6/27 through 7/7 1990 story arc

Allosaurus story arc
Allosaurus also appeared in this 1990 story arc. In it, Calvin and Hobbes had traveled back in time 140 million years on a photo safari. They came across Diplodocus, Stegosarus, and an Allosaurs – all of which had actually died out by 140 Ma BC. The Allosaurus was hostile to the time travelers, who only narrowly managed to escape.

Calvin the Allosaur

Allosaurus was also a minor recurring alter ego of Calvin's. It appeared as such in three Sunday strips.

Calvin, the Awful Allosaur

Calvin the Allosaur (identified as "Calvin, The Awful Allosaur") is a minor alter ego of Calvin's. It appeared in a single Sunday strip.

Ultrasauros attack

Brontosaurus attack

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