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Revista de biología marina y oceanografía

versión On-line ISSN 0718-1957

Resumen

SAEZ, Sylvia; LAMILLA, Julio  y  PEQUENO, Germán. Taxonomic keys based on the morphology of the caudal fin, for the sharks identification (Chondrichthyes; Elasmobranchii) from the Chilean coasts. Rev. biol. mar. oceanogr. [online]. 2012, vol.47, n.2, pp.245-256. ISSN 0718-1957.  http://dx.doi.org/10.4067/S0718-19572012000200007.

The role of shark's caudal fin has been studied from a morpho-functional point of view, in which it is established that participates in the fish locomotion, as well as in the prey capture by Alopiidae species. However, this trait has been scarcely used in taxonomic studies. Given the interspecific variation of this structure, it is hypothesized that might be used as a morphologic character for the species identification. Because of this, the preparations of taxonomic keys based on morphological specific characteristics of the caudal fin are needed, mainly when partially destroyed specimens are studied. This study proposes taxonomic keys for the 58 sharks species registered in Chile. These keys were made with the aim to be used in diagnosis and specific taxonomic identification of this fish group, as a complement or as an independent way, with relation to the already existent ones.

Palabras clave : Taxonomy; cartilaginous fishes; caudal peduncle; dorsal margin; preventral margin.

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