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(Claw),又稱爪子鉤爪,是大部份哺乳類鳥類及部份爬蟲類動物手指腳趾末端的表皮角質層附加物。

参考资料编辑

  • 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