Data from: Integrative taxonomy and species delimitation in harvestmen: a revision of the western North American genus Sclerobunus (Opiliones: Laniatores: Travunioidea)Shahan Derkarabetian & Marshal Hedin
Alpha taxonomy, and specifically the delimitation of species, is becoming increasingly objective and integrative. The use of coalescent-based methods applied to genetic data is providing new tools for the discovery and delimitation of species. Here, we use an integrative approach via a combination of discovery-based multivariate morphological analyses to detect potential new species. These potential species are then used as a priori species in hypothesis-driven validation analyses with genetic data. This research focuses on the...
Data from: Rapid diversification of sexual signals in Hawaiian Nesosydne planthoppers (Hemiptera: Delphacidae): the relative role of neutral and selective forcesKari Roesch Goodman, J. Patrick Kelley, Stephen Welter, George K. Roderick, Damian O. Elias & S. C. Welter
Changes in sexual signals have the potential to promote rapid divergence and reproductive isolation among populations of animals. Thus, identifying processes contributing to variation in signals is key to understanding the drivers of speciation. However, it is difficult to identify the processes initiating changes in signals in empirical systems because (1) the demographic history of populations under study is usually unclear, and (2) there is no unified hypothesis-testing framework for evaluating the simultaneous contribution of...
Data from: Phylogenomics resolves a spider backbone phylogeny and rejects a prevailing paradigm for orb web evolutionJason E. Bond, Nicole L. Garrison, Chris A. Hamilton, Rebecca L. Godwin, Marshal Hedin & Ingi Agnarsson
Spiders represent an ancient predatory lineage known for their extraordinary biomaterials, including venoms and silks. These adaptations make spiders key arthropod predators in most terrestrial ecosystems. Despite ecological, biomedical, and biomaterial importance, relationships among major spider lineages remain unresolved or poorly supported. Current working hypotheses for a spider “backbone” phylogeny are largely based on morphological evidence, as most molecular markers currently employed are generally inadequate for resolving deeper-level relationships. We present here a phylogenomic analysis...
Data from: New insights into New World biogeography: an integrated view from the phylogeny of blackbirds, cardinals, sparrows, tanagers, warblers, and alliesF. Keith Barker, Kevin J. Burns, John Klicka, Scott M. Lanyon & Irby J. Lovette
Understanding the biogeographic origins and temporal sequencing of groups within a region or of lineages within an ecosystem can yield important insights into evolutionary dynamics and ecological processes. Fifty years ago, Ernst Mayr generated comprehensive—if limited—inferences about the origins of the New World avifaunas, including the importance of pre-Isthmian dispersal between North and South America. Since then, methodological advances have improved our ability to address many of the same questions, but the phylogenies upon which...
Data from: High stakes species delimitation in eyeless cave spiders (Cicurina, Dictynidae, Araneae) from central TexasMarshal Hedin
A remarkable radiation of completely eyeless, cave-obligate spider species (Cicurina) has been described from limestone caves of Texas. This radiation includes over 50 described species, with a large number of hypothesized single-cave endemics, and four species listed as US Federally Endangered. Because of this conservation importance, species delimitation in the group is “high stakes” - it is imperative that species hypotheses are data-rich, objective, and robust. This paper focuses on a complex of four cave-dwelling...
Data from: Geneious! Simplified genome skimming methods for phylogenetic systematic studies: a case study in Oreocarya (Boraginaceae)Lee A. Ripma, Michael G. Simpson & Kristen Hasenstab-Lehman
Premise of the study: As systematists grapple with how to best harness the power of next-generation sequencing (NGS), a deluge of review papers, methods, and analytical tools make choosing the right method difficult. Oreocarya (Boraginaceae), a genus of 63 species, is a good example of a group lacking both species-level resolution and genomic resources. The use of Geneious removes bioinformatic barriers and makes NGS genome skimming accessible to even the least tech-savvy systematists. Methods: A...
Data from: Elaborate visual and acoustic signals evolve independently in a large, phenotypically diverse radiation of songbirdsNicholas A. Mason, Allison J. Shultz & Kevin J. Burns
The concept of a macroevolutionary trade-off among sexual signals has a storied history in evolutionary biology. Theory predicts that if multiple sexual signals are costly for males to produce or maintain and females prefer a single, sexually selected trait, then an inverse correlation between sexual signal elaborations is expected among species. However, empirical evidence for what has been termed the ‘transfer hypothesis’ is mixed, which may reflect different selective pressures among lineages, evolutionary covariates or...
San Diego State University7
Field Museum of Natural History1
University of California System1
University of Vermont1
Burke Museum of Natural History and Culture1
University of Minnesota1
University of California, Berkeley1
Rancho Santa Ana Botanic Garden1