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Janusiscus
''Janusiscus schultzei'' was a Gnathostomata (jawed vertebrate) dating from the Early Devonian period in Siberia, approximately 415 million years ago. It may be a common ancestor of either Chondrichthyes (cartilaginous fish) or Osteichthyes (bony fish) or both. If it is an ancestor to both types of fish, then ''J. schultzei'' would also be a common ancestor to all living jawed vertebrates. The species name is in honor of Hans-Peter Schultze.〔 〕 ==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「Janusiscus」の詳細全文を読む
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