Anchisaurus polyzelus

†Anchisaurus polyzelus is the type species of Anchisaurus, a basal sauropodomorph from the Early Jurassic of Connecticut and Massachusetts, United States. Measuring roughly 2m in length, this slender herbivore or omnivore had leaf-shaped teeth and a long neck. Originally described as a human bone in 1818, it was redescribed as a dinosaur in 1885 by Marsh.

Time Period

Jurassic Early Mesozoic Era

Anchisaurus polyzelus lived during the Jurassic Early period of the Mesozoic Era, approximately 201,4 to 174,7 million years ago.

After the Triassic-Jurassic extinction, dinosaurs rapidly diversified and became the dominant land vertebrates. Early sauropods and theropods began to evolve larger body sizes.