Tenontosaurus was 6.5 to 8 m long and 3 m high (in a bipedal stance), with a body mass of somewhere between 1 to 2 tons. It was a herbivorous animal, feeding on low-growing plants ...

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Dinosaur pictures  - Tenontosaurus!

Tenontosaurus (ancient Greek for "sinew lizard") is a genus of medium- to large-sized dinosaurs that existed in the middle Cretaceous period, between 115 and 108 million years ago, in what is today North America. It was about 6.5 - 8 m long, 3 m high (in a bipedal stance), with a mass of somewhere between 1 and 2 tons.

Its head and jaws were small relative to its huge and clumsy body. It had an unusually long, broad tail, which was stiffened with a network of bony tendons. From head to tail its entire body was topped with an extended outgrowth resembling a toothed crest.