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Accounting for molecular stochasticity in systematic revisions: species limits and phylogeny of Paroaria

Liliana M. Dávalos¹ and Ana L. Porzecanski²

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1. SUNY Stony Brook
2. CBC- American Museum of Natural History

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Manuscript

Date:

Received 22 June 2009 00:50 UTC; Posted 22 June 2009

Subjects:

Evolutionary Biology

Tags:

• DNA barcoding codon models parametric bootstrap two-prior on branch lengths model tree comparisons

Abstract:

Different frameworks have been proposed for using molecular data in systematic revisions, but there is ongoing debate on their applicability, merits and shortcomings. In this paper we examine the fit between morphological and molecular data in the systematic revision of Paroaria, a group of conspicuous songbirds endemic to South America. We delimited species based on examination of > 600 specimens, and developed distance-gap, and distance- and character-based coalescent simulations to test species limits with molecular data. The morphological and molecular data collected were then analyzed using parsimony, maximum likelihood, and Bayesian phylogenetics. The simulations were better at evaluating the new species limits than using genetic distances. Species diversity within Paroaria had been underestimated by 60%, and the revised genus comprises eight species. Phylogenetic analyses consistently recovered a congruent topology for the most recently derived species in the genus, but the most basal divergences were not resolved with these data. The systematic and phylogenetic hypotheses developed here are relevant to both setting conservation priorities and understanding the biogeography of South America.

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This document is licensed to the public under the Creative Commons Attribution 3.0 License

How to cite this document:

Dávalos, Liliana and Porzecanski, Ana. Accounting for molecular stochasticity in systematic revisions: species limits and phylogeny of Paroaria. Available from Nature Precedings <http://hdl.handle.net/10101/npre.2009.3357.1> (2009)

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