CERATOSAURUS nasicornis
This therapod had a pair of bony ridges above its eyes and a horn on its snout. These were probably used by males when fighting for a mate. Ceratosaurus was an active predator and had massive jaws and a hand with four fingers, unlike Allosaurus, who had three.
TIME - 156 - 145 MYA, Late Jurassic period.
RANGE - USA Colorado, Utah, Wyoming, Africa - Tanzania (Mtwara).
DIET - Carnivore (meat eater)
SIZE - Up to 20ft (6m) long.
WEIGHT - 1 US ton.
STEGOSAURUS armatus
A well known dinosaur, the stegosaurus was a large, heavy limbed, short legged, plant eater. Two rows of triangular shaped plates ran the course of its back, leading to its tail which displayed four long spikes. The spikes were probably weapons of defense, and the plates are now thought by many to help control body temperature.
TIME - 156 - 145 MYA, Late Jurassic period.
RANGE - Wyoming, Utah, Colorado.
DIET - Herbivorous (plants)
SIZE - 25ft (7 m) long.
see time period
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