|Dinosaurs in Their Time
DinoGuide: Dryosaurus altus
The rare Dryosaurus is the first of its species ever to be fully reconstructed and displayed as a three-dimensional, free-standing mounted skeleton.
Dryosaurus had long, powerful hind legs, indicating that it was a fast runner. Its long tail may have acted as a counterbalance when running. The front of the dinosaur's snout bore a small beak suitable for cropping plants, which were chewed with well-developed "cheek" teeth.
Dryosaurus is known from the western United States and Tanzania (East Africa),
providing key evidence for a land connection between these two regions
during the latter part of the Jurassic Period.
CARNEGIE SPECIMEN NUMBER:
SCIENTIFIC NAME MEANING:
"Tall oak reptile"
Dinosauria : Ornithischia : Ornithopoda : Dryosauridae
to 13 feet (4 meters)
FORMATION & LOCALITY:
Morrison Formation; Dinosaur National Monument, Uintah County, Utah
Earl Douglass and field crew, 1910
Late Jurassic, 145–150 million years ago
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