Abstract
The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H. wheatlandii) found in the upper Rio Doce basin. In the present study, partial sequences of the mitochondrial gene 16S were obtained for fifteen species of Brycon and for Henochilus wheatlandii. The results showed that the genus Brycon is paraphyletic, since Henochilus is the sister-group of B. ferox and B. insignis. The most basal species analyzed were the trans-Andean species B. henni, B. petrosus, and B. chagrensis.
Highlights
The subfamily Bryconinae includes 74 nominal species out of which 44 are currently considered as valid (Lima, 2003; 2004)
Species of Brycon are widely distributed from southern Mexico to the La Plata River in Argentina
A first attempt to infer a molecular-based phylogeny of the genera Brycon and Henochilus based on partial 16S rRNA mitochondrial sequences was conducted with the objectives to test the monophyly of Brycon and Bryconinae, the relationship between Brycon and Henochilus and the relationship among trans- and cisAndean species of Brycon
Summary
The subfamily Bryconinae includes 74 nominal species out of which 44 are currently considered as valid (Lima, 2003; 2004). Species of the genus Salminus were not included in the present analysis since morphological studies suggest that this genus has several plesiomorphic characters conveying a basal position within Characidae (Lima, 2006).
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