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Louisiana State University

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2020

Ultraconserved elements

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Mitochondrial Genomes And Thousands Of Ultraconserved Elements Resolve The Taxonomy And Historical Biogeography Of The Euphonia And Chlorophonia Finches (Passeriformes: Fringillidae), Tyler S. Imfeld, F. Keith Barker, Robb T. Brumfield Jul 2020

Mitochondrial Genomes And Thousands Of Ultraconserved Elements Resolve The Taxonomy And Historical Biogeography Of The Euphonia And Chlorophonia Finches (Passeriformes: Fringillidae), Tyler S. Imfeld, F. Keith Barker, Robb T. Brumfield

Faculty Publications

© 2020 American Ornithological Society. Relationships of the Neotropical finches in the genera Euphonia and Chlorophonia (Fringillidae: Euphoniinae) have been clarified by recent molecular studies, but species-level relationships within this group have not been thoroughly addressed. In this study, we sampled specimens representing every recognized species of these genera, in addition to 2 outgroup taxa, and used target enrichment to sequence thousands of ultraconserved element (UCE) loci, as well as mitochondrial DNA reconstructed from off-target reads, from each specimen to infer these relationships. We constructed both concatenation and coalescent-based estimates of phylogeny from this dataset using matrices of varying levels …


Phylogeography Of The Variable Antshrike (Thamnophilus Caerulescens), A South American Passerine Distributed Along Multiple Environmental Gradients, Sergio D. Bolívar-Leguizamón, Luís F. Silveira, Elizabeth P. Derryberry, Robb T. Brumfield, Gustavo A. Bravo Jul 2020

Phylogeography Of The Variable Antshrike (Thamnophilus Caerulescens), A South American Passerine Distributed Along Multiple Environmental Gradients, Sergio D. Bolívar-Leguizamón, Luís F. Silveira, Elizabeth P. Derryberry, Robb T. Brumfield, Gustavo A. Bravo

Faculty Publications

© 2020 Elsevier Inc. The Neotropics show a wealth of distributional patterns shared by many co-distributed species. A distinctive pattern is the so-called “circum-Amazonian distribution,” which is observed in species that do not occur in Amazonia but rather along a belt of forested habitats spanning south and east of Amazonia, the Andean foothills, and often into the Venezuelan Coastal Range and the Tepuis. Although this pattern is widespread across animals and plants, its underlying biogeographic mechanisms remain poorly understood. The Variable Antshrike (Thamnophilus caerulescens) is a sexually dimorphic suboscine passerine that exhibits extreme plumage variation and occurs along the southern …


Cave-Adapted Evolution In The North American Amblyopsid Fishes Inferred Using Phylogenomics And Geometric Morphometrics, Pamela B. Hart, Matthew L. Niemiller, Edward D. Burress, Jonathan W. Armbruster, William B. Ludt, Prosanta Chakrabarty May 2020

Cave-Adapted Evolution In The North American Amblyopsid Fishes Inferred Using Phylogenomics And Geometric Morphometrics, Pamela B. Hart, Matthew L. Niemiller, Edward D. Burress, Jonathan W. Armbruster, William B. Ludt, Prosanta Chakrabarty

Faculty Publications

© 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution. Cave adaptation has evolved repeatedly across the Tree of Life, famously leading to pigmentation and eye degeneration and loss, yet its macroevolutionary implications remain poorly understood. We use the North American amblyopsid fishes, a family spanning a wide degree of cave adaptation, to examine the impact of cave specialization on the modes and tempo of evolution. We reconstruct evolutionary relationships using ultraconserved element loci, estimate the ancestral histories of eye-state, and examine the impact of cave adaptation on body shape evolution. Our phylogenomic analyses provide a …