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however the differences can also be ascribed to the possible juvenile stage of the animal and/or a different feeding niche
Starfish have remained relatively unchanged throughout their 500-million-year history
Due to the sheer quantity of teeth produced over the eons by sharks
A primitive chordate from the Burgess Shale
Stegosaurus Dorsal Plate Protoceratops however the differences can alsoNamed Stegosaurus, or "roof lizard" for it's large, flat dorsal plates, this herbivorous dinosaur is a classic favorite. Scientists debate the purpose of those trademark plates, but many suggest they were used to regulate heat. Filled with blood vessels, the plates could quickly warm the big plant eater when faced towards the sun. Stegosaurus sp. Late Jurassic (150 m. y. a.) Morrison Formation Cleveland Lloyd Quarry, Utah Shipping Included