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Historical museum specimens are valuable for exploring population genetics and evolutionary questions because they can provide snapshots of morphological and genetic characteristics from populations over space and time. Unfortunately, DNA found in older museum specimens is frequently degraded, so obtaining genotypes from many individual samples necessary for rigorous molecular population genetic studies...
The American southwest and northern Mexico has a great degree of endemic diversity compared with the rest of North America. The Pleistocene glaciations and the dispersal of species from glacial refuges in this region have been important engines for the production of biodiversity in the region. The New World Junonia are a recent radiation of butterflies that are thought to have spent time in these...