Discovery of new predatory dinosaur species gives new insight on their evolution

(Louisiana State University Health Sciences Center) Scientists discovered a new tyrannosaur with an unusual mode of evolution. Findings include that Daspletosaurus horneri, or 'Horner's Frightful Lizard,' evolved directly from its geologically older relative, D. torosus, a rare form of evolution called anagenesis where one species gradually morphs into a new one. The research also changes the face of tyrannosaurs, which was covered by a lipless mask of scales, with patches of armor-like skin and horn, and a highly touch-sensitive snout.

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