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Pelagosaurus
''Pelagosaurus'' (meaning "lizard of the open sea") is an extinct genus of thalattosuchian crocodyliform that lived during the Toarcian stage of the Lower Jurassic, around 183 Ma to 175 Ma (million years ago), in shallow epicontinental seas that covered much of what is now Western Europe. The systematic taxonomy of ''Pelagosaurus'' has been fiercely disputed over the years, and was assigned to Thalattosuchia after its systematics within Teleosauridae were disputed. ''Pelagosaurus'' measured 3 m (10 ft) in length with a weight of 450 kg (1000 lbs), and was markedly similar to the modern-day gharial, which has similar adaptions and carnivorous feeding habits.〔https://sites.google.com/site/paleofilescom/pelagosaurus〕
==Discovery==
''Pelagosaurus'' was originally described from a specimen from Normandy, but the holotype for ''P. typus'' was discovered north of the town of Ilminster in Somerset, England. Most ''Pelagosaurus'' remains have been found in the Ilminster area, but numerous other remains, predominantly skulls and articulated skeletons, have been found around Western Europe in locations such as France and Germany. Specimens from the Somerset region come primarily from the Strawberry Bank quarry north of Ilminster; although the site had yielded other fossil remains before, the site has since been built over. One of the specimens was that of a small juvenile, providing some insight into ''Pelagosaurus''' growth pattern.〔Pierce SE, Benton MJ. 2006. ''Pelagosaurus typus'' Bronn, 1841 (Mesoeucrocodylia: Thalattosuchia) from the Upper Lias (Toarcian, Lower Jurassic) of Somerset, England. ''Journal of Vertebrate Paleontology'' 26 (3): 621–635.〕
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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