Resumo

KOBELKOWSKY, Abraham. Morphological diversity of the excretory duct system of teleostean fishes. Rev. Mex. Biodiv. [online]. 2007, vol.78, n.1, pp.105-116. ISSN 2007-8706.

By means of an anatomical analysis from 70 species of teleostean fishes, belonging to 62 genera, and 39 families, and 20 orders, the morphological diversity of the urinary Duch system is described. A general morphological teleostean pattern is defined as the fusion of both archinephric ducts in the common urinay duct, and the fusion in malesof the common urinary duct with the common spermatic duct in the urogenital duct. A relation between the length of thekidney and of the archinephric ducts is recongnized. The trajectory of the urinary ducts is described, with the “reversal”of the orientation of the urinary and urogenital ducts in Pleuronectiformes being noteworthy. The origin of the urinary bladder from the common urinary duct is suggested.

Palavras-chave : Urinary ducts; urogenital ducts; urinary bladder; Teleostei.

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