Temporal and spatial diversification of Pteroglossus araçaris (AVES Ramphastidae) in the neotropics: Constant rate of diversification does not support an increase in radiation during the Pleistocene
Mol. phylogenet. evol
; 58(1): 105-115, Nov 3, 2010.
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em En
| SES-SP, SESSP-IBPROD, SES-SP, SESSP-IBACERVO
| ID: biblio-1064797
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BR78.1
Localização: BR78.1
ABSTRACT
We use the small-bodied toucan genus Pteroglossus to test hypotheses about diversification in the lowlandNeotropics. We sequenced three mitochondrial genes and one nuclear intron from all Pteroglossus speciesand used these data to reconstruct phylogenetic trees based on maximum parsimony, maximumlikelihood, and Bayesian analyses. These phylogenetic trees were used to make inferences regarding boththe pattern and timing of diversification for the group. We used the uplift of the Talamanca highlands ofCosta Rica and western Panama as a geologic calibration for estimating divergence times on the Pteroglossustree and compared these results with a standard molecular clock calibration. Then, we used likelihoodmethods to model the rate of diversification. Based on our analyses, the onset of the Pteroglossus radiationpredates the Pleistocene, which has been predicted to have played a pivotal role in diversification in theAmazon rainforest biota. We found a constant rate of diversification in Pteroglossus evolutionary history,and thus no support that events during the Pleistocene caused an increase in diversification. We compareour data to other avian phylogenies to better understand major biogeographic events in the Neotropics.These comparisons support recurring forest connections between the Amazonian and Atlantic forests,and the splitting of cis/trans Andean species after the final uplift of the Andes. At the subspecies level, thereis evidence for reciprocal monophyly and groups are often separated by major rivers, demonstrating theimportant role of rivers in causing or maintaining divergence. Because some of the results presented hereconflict with current taxonomy of Pteroglossus, new taxonomic arrangements are suggested.
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06-national
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BR
Base de dados:
SES-SP
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SESSP-IBACERVO
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SESSP-IBPROD
Assunto principal:
Íntrons
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Genes Mitocondriais
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Mol. phylogenet. evol
Ano de publicação:
2010
Tipo de documento:
Article