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Molecular phylogeny of Aphyocharacinae
June 7, 2012
10:30 pm
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Bojan Dolenc
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September 26, 2010
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Tagliacollo et al (2012): Molecular phylogeny of Aphyocharacinae (Characiformes, Characidae) with morphological diagnoses for the subfamily and recognized genera. Molecular Phylogenetics and Evolution. Volume 64, Issue 2, August 2012, Pages 297–307.
Abstract
The subfamily Aphyocharacinae was recently redefined to comprise eight genera: Aphyocharax, Prionobrama, Paragoniates, Phenagoniates, Leptagoniates, Xenagoniates, Rachoviscus and Inpaichthys. This new composition, however, is partially incongruent with published results of molecular studies especially concerning the positions of Rachoviscus and Inpaichthys. Our goal was to investigate the monophyly of Aphyocharacinae and its interrelationships using three distinct phylogenetic methodologies: Maximum-likelihood and Bayesian analyses of molecular data, and also Parsimony analysis of a concatenated molecular and morphological dataset. All tree topologies recovered herein suggest that Rachoviscus, Inpaichthys and Leptagoniates pi do not belong to the Aphyocharacinae. The remaining aphyocharacin taxa analyzed do form a monophyletic group, which is itself composed of two subgroups being one comprised of Paragoniates, Phenagoniates, Leptagoniates and Xenagoniates, and the other comprised of Aphyocharax and Prionobrama. Internal relationships among these genera are statistically well supported and morphological synapomorphies are presented at the generic level. All tree topologies also indicate that Aphyocharacidium is closely related to Aphyocharacinae suggesting that it should be included in this subfamily. As recognized in the present study, the Aphyocharacinae is diagnosed by a single morphological synapomorphy: two dorsal-fin rays articulating with the first dorsal pterygiophore.
Highlights

► We investigate the monophyly of Aphyocharacinae (Characiformes, Characidae). ► We conducted separately parsimony, maximum-likelihood, and bayesian analyses. ► Aphyocharacinae is a non-monophyletic group. ► Four species were removed from the group including two genera and Leptagoniates pi. ► The genus Aphyocharacidium was included within the Aphyocharacinae.
Keywords
    Neotropical fishes;
    Evolutionary relationships;
    South America;
   Aphyocharax
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June 8, 2012
8:22 am
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Matt
Málaga, Spain
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June 13, 2011
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Thanks Bojan.Smile

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