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(Claw),又稱爪子鉤爪,是羊膜動物哺乳類鳥類爬蟲類)於手指腳趾末端的表皮角質層附加物。

參考資料

  • Maddin & al. (2009): The anatomy and development of the claws ofXenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods. Journal of Anatomy, no 214 (4): pp 607-19 Abstract頁面存檔備份,存於網際網路檔案館