An ancient fossil crocodile coated in armadillo-like body armor was unveiled yesterday at an environmental museum in Brazil. Dubbed Armadillosuchus arrudai, the newly described species of crocodile roamed the arid interior of Brazil about 90 million years ago, during the late Cretaceous period, scientists said. It was 6.6 feet (2 meters) long, weighed about 265 pounds (120 kilograms), and had a relatively wide head with a narrow, toothy snout.