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Diversification of Neoaves: integration of molecular sequence data and fossils.


ABSTRACT: Patterns of diversification and timing of evolution within Neoaves, which includes almost 95% of all bird species, are virtually unknown. On the other hand, molecular data consistently indicate a Cretaceous origin of many neoavian lineages and the fossil record seems to support an Early Tertiary diversification. Here, we present the first well-resolved molecular phylogeny for Neoaves, together with divergence time estimates calibrated with a large number of stratigraphically and phylogenetically well-documented fossils. Our study defines several well-supported clades within Neoaves. The calibration results suggest that Neoaves, after an initial split from Galloanseres in Mid-Cretaceous, diversified around or soon after the K/T boundary. Our results thus do not contradict palaeontological data and show that there is no solid molecular evidence for an extensive pre-Tertiary radiation of Neoaves.

SUBMITTER: Ericson PG 

PROVIDER: S-EPMC1834003 | biostudies-literature | 2006 Dec

REPOSITORIES: biostudies-literature

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Diversification of Neoaves: integration of molecular sequence data and fossils.

Ericson Per G P PG   Anderson Cajsa L CL   Britton Tom T   Elzanowski Andrzej A   Johansson Ulf S US   Källersjö Mari M   Ohlson Jan I JI   Parsons Thomas J TJ   Zuccon Dario D   Mayr Gerald G  

Biology letters 20061201 4


Patterns of diversification and timing of evolution within Neoaves, which includes almost 95% of all bird species, are virtually unknown. On the other hand, molecular data consistently indicate a Cretaceous origin of many neoavian lineages and the fossil record seems to support an Early Tertiary diversification. Here, we present the first well-resolved molecular phylogeny for Neoaves, together with divergence time estimates calibrated with a large number of stratigraphically and phylogenetically  ...[more]

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