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Appalachiosaurus
''Appalachiosaurus'' ( ; "Appalachian lizard") is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous Period of eastern North America. Like almost all theropods, it was a bipedal predator. Only a juvenile skeleton has been found, representing an animal over 7 meters (23 ft) long and weighing over 600 kilograms (1300 lb), which indicates an adult would have been even larger. It is the most completely known theropod from the eastern part of North America.
Fossils of ''Appalachiosaurus'' were found in central Alabama, from the Demopolis Chalk Formation. This formation dates to the middle of the Campanian stage of the Late Cretaceous, or around 77 million years ago.
==Discovery and naming==
The type specimen was found by Auburn University geologist David King in eastern North America in July 1982.〔http://www.australianmuseum.net.au/page/Appalachiosaurus-montgomeriensis/〕 This dinosaur was named after the region of the eastern United States known as Appalachia, which also gave its name to the ancient island continent on which ''Appalachiosaurus'' lived. Both are named after the Appalachian Mountains. The generic name also includes the Greek word ''sauros'' ("lizard"), the most common suffix used in dinosaur names. There is one known species, ''A. montgomeriensis'', which is named after Montgomery County in the U.S. state of Alabama. Both genus and species were named in 2005 by paleontologists Thomas Carr, Thomas Williamson, and David Schwimmer.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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