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ノコギリザメの化石から、古代魚の歯が体の鱗から進化した可能性が高いことが判明(Sawfish fossils suggest teeth likely evolved from body scales in ancient fish)
2022-08-23 ペンシルベニア州立大学(PennState) A rostral denticle of Ischyrhiza mia, a species belonging to an extinct group of sawfi...