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	Provedor de dados 16 (1) Autor Alibardi, L. (1) Palavra-chave 42.82 (1) Autoradiography (1) Claws (1) Cornification (1) Histogenesis (1) Reptiles (1) Ultrastructure (1) Mais... Tipo do documento Article / Letter to the editor (1) Ano 2009 (1) País Netherlands (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Development, comparative morphology and cornification of reptilian claws in relation to claws evolution in tetrapods 16 Alibardi, L.. The development of claws in different reptiles and their cornification are analyzed using histological, ultrastructural and autoradiographic methods. Claws develop at the tip of digits in relation to the growth of the terminal phalanx and appear as modified scales. The apical epidermis of digit becomes thickened and is associated with a mesenchymal condensation or a dense mesenchyme. The dorsal side of the digit becomes the unguis while the ventral side becomes the sub-unguis. The corneous layer in the unguis is thicker than in the sub-unguis and accumulates hard-keratin while corneocytes remain separated or partially fused. Bundles of hard-keratin tend to accumulate in parallel orientation with respect to the surface and are directed toward the claw tip.... Tipo: Article / Letter to the editor Palavras-chave: Autoradiography; Claws; Cornification; Histogenesis; Reptiles; Ultrastructure; 42.82. Ano: 2009 URL: http://www.repository.naturalis.nl/record/304588 Registros recuperados: 1 Primeira ... 1 ... Última

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