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5,734 pixels (19.1") wide
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Image Use

Publication History


The remains of a Tenontosaurus were discovered together with several Deinonychus skeletons in a Montana fossil site. Since Deinonychus was a fierce predator and Tenontosaurus was a plant-eater, it is likely that this fossil discovery represents an ancient attack forever frozen in time.

Vital Statistics

Genus Name: Tenontosaurus ("sinew lizard")
Type Species: * T. tillettorum (Ostrom, 1970)
Length: 18-24 feet (5.5-7 meters)
Weight: 1 ton
Time: 115 million years ago (Early Cretaceous)
Place: Montana, Texas, Utah, Wyoming, Oklahoma
Diet: plant-eater (herbivore)

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