Data/hora: 09/06/2024 15:14:29

Provedor de dados: 	74	
País: 	Brazil	
Título: 	The historical biogeography of  Pteroglossus  aracaris (Aves, Piciformes, Ramphastidae) based on Bayesian analysis of mitochondrial DNA sequences	
Autores: 	Pereira,Sérgio L.; Wajntal,Anita.	
Data: 	2008-12-01	
Ano: 	2008	
Palavras-chave: 	Pteroglossus; Ramphastidae; Aves; Molecular time estimates; Biogeography.	
Resumo: 	Most Neotropical birds, including  Pteroglossus  aracaris, do not have an adequate fossil record to be used as time constraints in molecular dating. Hence, the evolutionary timeframe of the avian biota can only be inferred using alternative time constraints. We applied a Bayesian relaxed clock approach to propose an alternative interpretation for the historical biogeography of  Pteroglossus  based on mitochondrial DNA sequences, using different combinations of outgroups and time constraints obtained from outgroup fossils, vicariant barriers and molecular time estimates. The results indicated that outgroup choice has little effect on the Bayesian posterior distribution of divergence times within  Pteroglossus , that geological and molecular time constraints seem equally suitable to estimate the Bayesian posterior distribution of divergence times for  Pteroglossus , and that the fossil record alone overestimates divergence times within the fossil-lacking ingroup. The Bayesian estimates of divergence times suggest that the radiation of  Pteroglossus  occurred from the Late Miocene to the Pliocene (three times older than estimated by the “standard” mitochondrial rate of 2% sequence divergence per million years), likely triggered by Andean uplift, multiple episodes of marine transgressions in South America, and formation of present-day river basins. The time estimates are in agreement with other Neotropical taxa with similar geographic distributions.	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500026	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572008005000021	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.31 n.4 2008	
Fonte: 	info:eu-repo/semantics/openAccess