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Onchosaurus
''Onchosaurus'' is an extinct genus of cartilaginous fishes belonging to the family Sclerorhynchidae. These extinct fishes lived in the Cretaceous period, from 84.9 to 66.043 Ma. Fossils have been found in the Cretaceous sediments of Egypt, Morocco, France, Niger, Peru and United States. 〔 ==Description== These sclerorhynchiform sawfishes are only known by isolated vertebra and rostral spines. On the basis of fossil findings they are considered large, bottom-dwelling fishes, mainly inhabiting shallow marine habitats, but they were also powerful swimmers.〔 Jürgen Kriweta, Stefanie Klug ( Presence of the extinct sawfish, Onchosaurus (Neoselachii, Sclerorhynchiformes) in the Late Cretaceous of Peru with a review of the genus ) 〕
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「Onchosaurus」の詳細全文を読む
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