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Systematics of a radiation of Neotropical suboscines (Aves: Thamnophilidae: Epinecrophylla)

View ORCID ProfileOscar Johnson, Jeffrey T. Howard, Robb T. Brumfield
doi: https://doi.org/10.1101/2020.03.26.009746
Oscar Johnson
aDepartment of Biological Sciences and Museum of Natural Science, Louisiana State University, Baton Rouge, LA 70803, USA
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  • For correspondence: ojohns7@lsu.edu jtylerh12@gmail.com robb@lsu.edu
Jeffrey T. Howard
aDepartment of Biological Sciences and Museum of Natural Science, Louisiana State University, Baton Rouge, LA 70803, USA
bLouisiana State University Health Sciences Center Shreveport, Shreveport, LA 71103, USA
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Robb T. Brumfield
aDepartment of Biological Sciences and Museum of Natural Science, Louisiana State University, Baton Rouge, LA 70803, USA
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Abstract

The stipple-throated antwrens of the genus Epinecrophylla (Aves: Thamnophilidae) are represented by eight species primarily found in the lowlands of the Amazon Basin and the Guiana Shield. The genus has a long and convoluted taxonomic history, with many attempts made to address the taxonomy and systematics of the group. Here we employ massively parallel sequencing of thousands of ultraconserved elements (UCEs) to provide both the most comprehensive subspecies-level phylogeny of Epinecrophylla antwrens and the first population-level genetic analyses for most species in the genus. Most of our analyses are robust to a diversity of phylogenetic and population genetic methods, but we show that even with thousands of loci we are unable to confidently place the western Amazonian taxon pyrrhonota. We uncovered phylogenetic relationships between taxa and patterns of population structure that are discordant with both morphology and current taxonomy. For example, we found deep genetic breaks between taxa in the ornata group currently regarded as species, and in the haematonota and leucophthalma groups we found paraphyly at the species and subspecies levels, respectively. Our population genetics analyses showed extensive admixture between some taxa despite their deep genetic divergence. We present a revised taxonomy for the group, discuss the biogeographic patterns that we uncover, and suggest areas for further study.

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Posted March 29, 2020.
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Systematics of a radiation of Neotropical suboscines (Aves: Thamnophilidae: Epinecrophylla)
Oscar Johnson, Jeffrey T. Howard, Robb T. Brumfield
bioRxiv 2020.03.26.009746; doi: https://doi.org/10.1101/2020.03.26.009746
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Systematics of a radiation of Neotropical suboscines (Aves: Thamnophilidae: Epinecrophylla)
Oscar Johnson, Jeffrey T. Howard, Robb T. Brumfield
bioRxiv 2020.03.26.009746; doi: https://doi.org/10.1101/2020.03.26.009746

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