Dinosaurs Alive

Scene 4 - Predator Trap


The Enemy Within


Based on the findings at the Cleveland Lloyd Quarry in Utah. Juvenile Allosaurus get stuck in the mud of a water hole. Other Allosaurus are drawn to their thrashing and prey on them. A juvenile stegosaurus also gets stuck in the mud and tries to escape, while mother and sibling look on. A much larger Allosaurus comes down the hill to check out the commotion. Surprisingly, fossil evidence shows that sometimes mother and sibling actually fed on their own juveniles!

Monolophosaurus
Monolophosaurus

Monolophosaurus, with its single head crest, is in many ways similar in appearance to the North American Dilophosaurus.

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Eotyrannus
Eotyrannus

An early tyrannosaur, Eotyrannus was a small, slender theropod with proportionally long legs and toes.

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Herrarasaurus
Herrarasaurus

With the discovery of an almost complete skeleton and skull in 1988 the small, lightly built Herrerasaurus was finally determined to be either a very early theropod or early saurischian (lizard-hipped dinosaur).

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Carnotaurus
Carnotaurus

Short stubby arms, short stubby horns. Carnotaurus, was definitely an odd looking theropod. The forearms were even shorter than Tyrannosaurus rex - in fact they were so short that the hands appeared to be sprouting from the upper arm bone, the humerus!

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Allosaurus
Allosaurus

Studies of Allosaurus hindlimbs indicate that juveniles had a longer leg length than sub-adults or adults. This fact would indicate that locomotion was also different.

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Stegosaurus
Stegosaurus

Trackways of Stegosaurus show that it was a herd animal with all ages of animals living together. This herd mentality would have offered protection from predators to the vulnerable, smaller juveniles.

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