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''Polysternon'' is a genus of turtles in the extinct family Bothremydidae. It was described by Portis in 1882, and contains the species ''P. provinciale'' (originally placed in the genus ''Pleurosternon''), which existed during the Cretaceous of what is now France; ''P. atlanticum'', which existed during the Cretaceous of what is now Spain, and a new species, ''P. isonae'', from the Late Maastrichtian of Spain. The species epithet of ''P. isonae'' refers to the municipality Isona i Conca Dellà in Catalonia, where the type specimen was discovered. ==Species== * ''Polysternon provinciale'' (Matheron, 1869) * ''Polysternon atlanticum'' Lapparent de Broin & Murelaga, 1996 * ''Polysternon isonae'' Marmi et al., 2012 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「Polysternon」の詳細全文を読む スポンサード リンク
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