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Order: Lytoceratida
They appeared at the start of the Cambrian period and flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when the last of the trilobites disappeared in the mass extinction at the end of the Permian 250 million years ago (m
this life size relief sculpture makes a very bold statement
Dedication
Tyrannosaurus rex (Tinker) Foot & Track Combo Baryonyx Order: LytoceratidaThis is a Trex foot and track combination. This complete T rex foot is from the Cretaceous of South Dakota. The foot is 20 inches high x 22 inches long x 14 inches wide. The track is 29 inches long and 25 inches wide. The foot is cast from a juvenile specimen known as Tinker. The track is a sculpture by Michael Ryba. Notice how similar the foot is to a chickens foot: one of the many similarities between Theropod dinosaurs and modern birds. With these