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BackgroundA major goal in evolutionary biology is to understand the evolution of phenotypic diversity. Both natural and sexual… Expand Cave organisms occupy a special place in evolutionary biology because convergent morphologies of many species demonstrate… Expand Being able to efficiently and accurately delimit species is one of the most basic and important aspects of systematics because… Expand Abstract The evidentiary basis of the currently accepted classification of living amphibians is discussed and shown not to… Expand Adaptive radiations have served as model systems for quantifying the build-up of species richness. Few studies have quantified… Expand Abstract An important dimension of adaptive radiation is the degree to which diversification rates fluctuate or remain constant… Expand The plethodontid genus Batrachoseps, the slender salamanders, is the most diverse clade of salamanders in western North America… Expand Abstract The effect of courtship pheromones on female receptivity was tested in the terrestrial plethodontid salamander… Expand Abstract Red-backed salamanders, Plethodon cinereus , were paired in laboratory chambers where they defended areas against each… Expand Bolitoglossa occidentalis, a lowland salamander of Mexico and Guatemala, has a highly derived morphology. The features that are… Expand