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were aquatic predators that thrived until the end of the Paleozoic Era for about 250 million years
they had small slender heads on long necks (which made up about 40% of the length of the body in front of the hips)
Archaephippus could reach considerable dimensions
and Wannaganosuchus brachymanus from Allognathosuchus
Tyrannosaurus rex Complete Foot & Track Combo Alamosaurus were aquatic predators that thrivedThis is a Trex foot and track combination. This complete T rex foot is from the Cretaceous of South Dakota. The foot is 40 inches high x 20 inches wide. The track is 29 inches long and 25 inches wide. The foot is cast from an adult specimen. The track is 48 x 48 inches and one of only 2 known from Trex. Notice how similar the foot is to a chickens foot: one of the many similarities between Theropod dinosaurs and modern birds. With these huge feet and
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