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Wodnika
''Wodnika'' is an extinct genus of shark which lived in the Late Permian period in the present area of Germany and Russia. It measured about 1 m (3.2 ft) in length and its tail shape indicates it was probably a good swimmer. Internally, the cartilage skeleton is preserved on the fossil, which is fairly rare for fossilized sharks.〔http://www.nhm.ac.uk/about-us/news/2008/july/rare-british-shark-fossil-joins-collection18285.html〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Wodnika」の詳細全文を読む
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