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$450 Scientific Name: Apatosaurus sp
The most famous specimens of Helicoprion are found in eastern Idaho
the earliest species
The large hollow bony crest had not yet developed on this young and small specimen
It had relatively short legs and a short
Orthacanthus/Xenacanths Shark skeleton Dimorphodon $450 Scientific Name: Apatosaurus spOrthacanthus is an extinct genus of fresh water shark from a family of prehistoric sharks known as Xenacanths. Members of the genus had a long spine growing from the back of their skull and a very long dorsal fin, which ran all along its back giving it an eel like appearance. About 260 million years ago, Orthacanthus was the terror of freshwater swamps and bayous in Europe and North America. Its body reached nearly 10 feet (3 meters) in length and its