The (mis)concept of species recognition.

To many, the concept of 'species recognition' is integral to the origin and maintenance of species. However, the heuristic value of species recognition is hampered by its reliance on the problematic concept of species. In this paper, we first discuss assumptions associated with prevailing use of the term, including the typological implications of the concept, the false dichotomy of compatibility and mate quality, and the commonly held model of species recognition in which animals determine taxonomic status before mate status. Subsequently, we propose research directions aimed to improve our understanding of the role of courtship behavior in speciation. We propose two complementary research approaches, one addressing the processes that drive the evolution of mate recognition systems and the other addressing the phenotypic architecture of behavioral isolation. Our approach emphasizes the fitness consequences and multidimensional nature of mate choice.