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Manuel Marí-Beffa, Carmen Murciano
Zebrafish fins have a proximal skeleton of endochondral bones and a distal skeleton of dermal bones. Recent experimental and genetic studies are discovering mechanisms to control fin skeleton morphogenesis. Whereas the endochondral skeleton has been extensively studied, the formation of the dermal skeleton requires further revision. The shape of the dermal skeleton of the fin is generated in its distal growing margin and along a proximal growing domain. In these positions, dermoskeletal fin morphogenesis can be explained by intertissue interactions and the function of several genetic pathways...
November 2010: Developmental Dynamics: An Official Publication of the American Association of Anatomists
J Géraudie
The features of the dermal skeleton of the pectoral fins of two Brachiopterygii, Polypterus senegalus and Calamoichthys calabaricus, have been studied by light and electron microscopy. The components studied are the ganoine-covered lepidotrichia segments and the distally located actinotrichia, the features of which are similar to those in teleosts. An irregular patch of ganoine susceptible to erosion by vascular canals lies on top of the cellular bone of the upper surface of the segment. It is separated from the stratified epidermis by an organic intermediate layer in place of the dermoepidermal interface...
May 1988: Anatomical Record
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