Tackling the species problem: theory and application in plant ­feeding insects

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Biological diversity and evolutionary success are often measured in terms of species numbers, but for many groups of organisms, it is difficult to determine where one species ends and another begins. This uncertainty has its origins in the evolutionary processes that create those species in the first place. The research programme will address both theoretical and practical aspects of the “species problem”, examining the processes that create species and developing methods to circumscribe and describe them.