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Diversification across the Isthmus of Tehuantepec explains the phylogeographic arrangement of the widespread bright-rumped Attila (Attila spadiceus; Tyrannidae) and reveals the existence of two major lineages

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Abstract

We describe the phylogeographic structure of Attila spadiceus, a neotropical bird with 12 recognized subspecies, through the analysis for partial Cytb amplicon region obtained from 11 subspecies. The topology recovered from the analysis indicated the existence of two principal molecular lineages and that the morphological variation underlying the designation of subspecies is not reflected in the mitochondrial gene tree. Based on these findings, we infer that the diversification of A. spadiceus began at the Pleistocene (~ 1.5 Mya), with the Isthmus of Tehuantepec region as the main factor driving the formation of two molecular lineages, one to the west and the other one to the east of this geographic barrier.

Zusammenfassung

Diversifizierung am Isthmus von Tehuantepec erklärt die phylogeographische Situation des weitverbreiteten Gelbbürzel-Attilatyrannen Attila spadiceus (Tyrannidae) und deckt die Existenz zweier Hauptlinien auf.

Wir beschreiben die phylogeographische Struktur von Attila spadiceus, einer neotropischen Vogelart mit 12 anerkannten Unterarten, anhand von Teilen der Cytb-Region von 11 der Unterarten. Die von dieser Analyse abgeleitete Topologie zeigt die Existenz von zwei molekularen Hauptlinien an und dass sich die morphologische Variabilität, die der Beschreibung der Unterarten zugrunde liegt, nicht in der auf mitochondrialen Genen basierenden Baumstruktur spiegelt. Aus diesen Ergebnissen leiten wir ab, dass die Aufspaltung von A. spadiceus im Pleistozän (vor ~ 1,5 Millionen Jahren) erfolgte, und dass die Region des Isthmus von Tehuantepec als wichtigster Faktor die Bildung der beiden molekularen Linien westlich und östlich dieser Barriere vorangetrieben hat.

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Acknowledgements

This research was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq Grants 439040/2018-3 and 312404/2019-0 to JA, and 311539/2019-0 to PSR), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES process 88881.337398/2019-01 to PSR). We are grateful to the institutions that contributed to the development of this study, including the Universidade Federal do Pará (UFPA), the Instituto de Estudos Costeiros (IECOS) and the Goeldi Museum in Belem for allowing us to obtain tissue samples from the specimens under their care. We thank Stephen Ferrari for the revision of the manuscript. We also thank Dr. Ulf Mehlig for translating the abstract into German.

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Correspondence to Péricles Sena do Rêgo.

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Communicated by M. Wink.

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Mendonça, P., Dias, C., Aleixo, A. et al. Diversification across the Isthmus of Tehuantepec explains the phylogeographic arrangement of the widespread bright-rumped Attila (Attila spadiceus; Tyrannidae) and reveals the existence of two major lineages. J Ornithol 163, 327–332 (2022). https://doi.org/10.1007/s10336-021-01928-3

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  • DOI: https://doi.org/10.1007/s10336-021-01928-3

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