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Protospinax
''Protospinax'' is an extinct genus of cartilaginous fish found in the Solnhofen limestones of southern Bavaria. It is a difficult taxon to accommodate in taxonomies. Formerly known from only two specimens, further museum specimens were discovered at the Museum of Comparative Zoology of Harvard University in the 1990s, having been misidentified as ''Squatina'' and ''Heterodontus''. ''Protospinax'' was about 1.7 m in length.〔http://palaeos.com/vertebrates/neoselachii/squalea.html〕 ==References==
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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「Protospinax」の詳細全文を読む
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