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Phylogenetic relationships of the African genera Alestes and Brycinus (Teleostei, Characiformes, Alestidae)

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The family Alestidae (also referred to as the African Characidae) comprises the African dwarf forms ("Petersiini") and the genera Alestes, Brycinus, Bryconaethiops, and Hydrocynus. Although several authors have presented characters to support the monophyly of the family, a cladistic analysis of the group has not been published. Furthermore, the interrelationships of the constituent groups are the subject of some controversy. A cladistic analysis of the Alestidae is presented, including characters to support the monophyly of the family. The results of this study indicate that several species should be removed from the genus Brycinus, that Hydrocynus is the sister group of Alestes s.str. (containing only five species), and that the dwarf alestids ("Petersiini") do not form a monophyletic group.

La famille des Alestidae (que l'on appelle parfois les Characidae africains) comprennent les formes africaines naines (« Petersiini ») et les genres Alestes, Brycinus, Bryconaethiops et Hydrocynus. Bien que plusieurs auteurs aient présenté des caractères pour appuyer l'hypothèse de la monophylie de cette famille, aucune analyse cladistique de ce groupe n'a jamais été publiée. De plus, les relations entre les groupes constituants sont sujettes à controverse. Nous présentons ici une analyse cladistique des Alestidae et une liste des caractères qui appuient l'hypothèse de la monophylie de la famille. Les résultats de notre étude indiquent que plusieurs espèces devraient être retirées du genreBrycinus, qu'Hydrocynus est le groupe soeur d'Alestes s.str. (qui n'inclut que cinq espèces) et que les Alestidae nains (« Petersiini ») ne forment pas un groupe monophylétique.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: November 1, 2002

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