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Pycnosteus
''Pycnosteus'' is an extinct genus of jawless fish from the Devonian. It is thought to have cruised through vegetation, eating small invertebrates which it knocked loose .〔(【引用サイトリンク】title=Pteraspidomorphi: Psammosteida (2): Guerichosteids, Pycnosteids, Psammosteids & ''Psammolepis'' )〕 == Sources ==
* ''Fishes of the World'' by Joseph S. Nelson * ''Vertebrate Fossils and the Evolution of Scientific Concepts'' by W. Sargeant
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「Pycnosteus」の詳細全文を読む
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