13 Works

Data from: Molecular phylogeny and phylogeography of the Australian freshwater fish genus Galaxiella, with an emphasis on dwarf Galaxias (G. pusilla)

Peter J. Unmack, Justin C. Bagley, Mark Adams, Michael P. Hammer & Jerald B. Johnson
The freshwater fauna of Southern Australia is primarily restricted to the southwestern and southeastern corners of the continent, and is separated by a large, arid region that is inhospitable to this biota. This geographic phenomenon has attracted considerable interest from biogeographers looking to explain evolutionary diversification in this region. Here, we employed phylogenetic and phylogeographic approaches to evaluate the effect of this barrier on a group of four galaxiid fish species (Galaxiella) endemic to temperate...

Data from: Divergence and diversification in North American Psoraleeae (Fabaceae) due to climate change

Ashley N. Egan & Keith A. Crandall
BACKGROUND: Past studies in the legume family (Fabaceae) have uncovered several evolutionary trends including differential mutation and diversification rates across varying taxonomic levels. The legume tribe Psoraleeae is shown herein to exemplify these trends at the generic and species levels. This group includes a sizable diversification within North America dated at approximately 6.3 million years ago with skewed species distribution to the most recently derived genus, Pediomelum, suggesting a diversification rate shift. We estimate divergence...

Data from: Resolving the phylogeny of lizards and snakes (Squamata) with extensive sampling of genes and species

John J. Wiens, Carl R. Hutter, Daniel G. Mulcahy, Brice P. Noonan, Ted M. Townsend, , Tod W. Reeder & J. W. Sites
Squamate reptiles (lizards and snakes) are one of the most diverse groups of terrestrial vertebrates. Recent molecular analyses have suggested a very different squamate phylogeny relative to morphological hypotheses, but many aspects remain uncertain from molecular data. Here, we analyse higher-level squamate phylogeny with a molecular dataset of unprecedented size, including 161 squamate species for up to 44 nuclear genes each (33,717 base pairs), using both concatenated and species-tree methods for the first time. Our...

Data from: Accuracy and precision of species trees: effects of locus, individual, and base-pair sampling on inference of species trees of the Liolaemus darwinii group (Squamata, Liolaemidae)

Arley Camargo, Luciano J. Avila, Mariana Morando, Jack W. Sites & Jack W. Sites
Molecular phylogenetics has entered a new era in which species trees are estimated from a collection of gene trees using methods that accommodate their heterogeneity and discordance with the species tree. Empirical evaluation of species trees is necessary to assess the performance (i.e., accuracy and precision) of these methods with real data, which consist of gene genealogies likely shaped by different historical and demographic processes. We analyzed 20 loci for 16 species of the South...

Data from: Lizards on ice: evidence for multiple refugia in Liolaemus pictus (Liolaemidae) during the Last Glacial Maximum in the southern Andean beech forests

Iván Vera-Escalona, Guillermo D’Elía, Nicolás Gouin, Frank M. Fontanella, Carla Muñoz-Mendoza, , Pedro F. Victoriano, Guillermo D'Elía & Jack W. Sites
Historical climate changes and orogenesis are two important factors that have shaped intraspecific biodiversity patterns worldwide. Although southern South America has experienced such complex events, there is a paucity of studies examining the effects on intraspecific diversification in this part of the world. Liolaemus pictus is the southernmost distributed lizard in the Chilean temperate forest, whose genetic structure has likely been influenced by Pleistocene glaciations. We conducted a phylogeographic study of L. pictus in Chile...

Data from: Phylogeny and biogeography of rainbowfishes (Melanotaeniidae) from Australia and New Guinea

Peter J. Unmack, Gerald R. Allen & Jerald B. Johnson
The family Melanotaeniidae (rainbowfishes) represents the largest monophyletic group of freshwater fishes found in Australia and New Guinea. The family consists of seven genera and a total of 81 species, which are broadly distributed throughout the region. We conducted a phylogenetic analysis of Melanotaeniidae based on nearly complete taxonomic sampling of all species. We sequenced seven protein coding mitochondrial genes and the first two introns of the nuclear S7 gene, for a total of 6827...

Data from: Dragons in our midst: phyloforensics of illegally traded Southeast Asian monitor lizards

Welton J. Luke, Cameron D. Siler, Charles W. Linkem, Arvin C. Diesmos, Mae L. Diesmos, Emerson Sy, Rafe M. Brown & Luke J. Welton
We provide a phylogenetic and population genetic evaluation of the illegal pet and bush meat trade of monitor lizards in the Philippines. We use a molecular dataset assembled from vouchered samples with known localities throughout the country, as a reference for statistical phylogenetic, population genetic, and DNA barcoding analyses of genetic material obtained during a three year survey of the Manila pet trade. Our results provide the first genetic evaluation of a major Southeast Asian...

Data from: How lizards survived blizzards: phylogeography of the Liolaemus lineomaculatus group (Liolaemidae) reveals multiple breaks and refugia in southern Patagonia, and their concordance with other co-distributed taxa

Maria Breitman, Luciano Avila, Jack Sites, Mariana Morando & Jack W. Sites
Patagonia was shaped by a complex geological history, including the Miocene uplift of the Andes, followed by volcanism, marine introgressions, and extreme climatic oscillations during Pleistocene glaciation–deglaciation cycles. The distributional patterns and phylogenetic relationships of southern patagonian animals and plants were affected in different ways, and those imprints are reflected in the seven phylogeographic breaks and eight refugia that have been previously proposed. In this study we estimated time-calibrated phylogenetic/phylogeographic patterns in lizards of the...

Data from: Deep sequencing of amplicons reveals widespread intraspecific hybridization and multiple origins of polyploidy in big sagebrush (Artemisia tridentata)

Bryce A. Richardson, Justin T. Page, Prabin Bajgain, Stewart C. Sanderson & Joshua A. Udall
PREMISE OF THE STUDY: Hybridization has played an important role in the evolution and ecological adaptation in diploid and polyploid plants. Artemisia tridentata (Asteraceae) tetraploids are extremely widespread and of great ecological importance. These tetraploids are often taxonomically identified as A. tridentata ssp. wyomingensis, or as autotetraploids of diploid subspecies tridentata and vaseyana. Few details are available as to how these tetraploids are formed or how they are related to diploid subspecies. METHODS: We used...

Data from: The role of continental shelf width in determining freshwater phylogeographic patterns in southeastern Australian pygmy perches (Teleostei: Percichthyidae)

Peter J. Unmack, Michael P. Hammer, Mark Adams, Jerald B. Johnson & Thomas E. Dowling
Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. South-eastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of...

Data from: Marine-freshwater transitions are associated with the evolution of dietary diversification in terapontid grunters (Teleostei: Terapontidae)

Aaron M. Davis, Peter J. Unmack, Bradley J. Pusey, Richard G. Pearson & Jerry B. Johnson
The ecological opportunities associated with transitions across the marine-freshwater interface are regarded as an important catalyst of diversification in a range of aquatic taxa. Here, we examined the role of these major habitat transitions and trophic diversification in a radiation of Australasian fishes using a new molecular phylogeny incorporating 37 Terapontidae species. A combined mitochondrial and nuclear gene analysis yielded a well supported tree with most nodes resolved. Ancestral terapontids appear to have been euryhaline...

Data from: Species delimitation with ABC and other coalescent-based methods: a test of accuracy with simulations and an empirical example with lizards of the Liolaemus darwinii complex (Squamata: Liolaemidae)

Arley Camargo, Mariana Morando, Luciano Javier Avila &
Species delimitation is a major research focus in evolutionary biology because accurate species boundaries are a prerequisite for the study of speciation. New species delimitation methods (SDMs) can accommodate non-monophyletic species and gene tree discordance as a result of incomplete lineage sorting via the coalescent model, but do not explicitly accommodate gene flow after divergence. Approximate Bayesian Computation (ABC) can incorporate gene flow and estimate other relevant parameters of the speciation process while testing alternative...

Data from: Conflicting evolutionary patterns due to mitochondrial introgression and multilocus phylogeography of the Patagonian freshwater crab Aegla neuquensis

Brian R. Barber, Jiawu Xu, Marcos Pérez-Losada, Carlos G. Jara & Keith A. Crandall
BACKGROUND: Multiple loci and population genetic methods were employed to study the phylogeographic history of the Patagonian freshwater crab Aegla neuquensis (Aeglidae: Decopoda). This taxon occurs in two large river systems in the Patagonian Steppe, from the foothills of the Andes Mountains east to the Atlantic Ocean. METHODOLOGY/PRINCIPAL FINDINGS: A nuclear phylogeny and multilocus nested clade phylogeographic analysis detected a fragmentation event between the Negro and Chico-Chubut river systems. This event occurred approximately 137 thousand...

Registration Year

  • 2012

Resource Types

  • Dataset


  • Brigham Young University
  • National Evolutionary Synthesis Center
  • University of Adelaide
  • University Austral de Chile
  • South Australian Museum
  • University of Kansas
  • University of South Dakota
  • National Museum
  • University of Washington
  • University of Santo Tomas