seems many are naive to the controversy about the issue of species and just accepts mayr's definition of a biological species in coyne j a orr h a sinauer associates sunderland ma speciation the author describes nine different species concepts a more recent abstract and article further highlights issues of interest by mallet who adopts a more darinian view once again this article free online discusses the issues and is a good read philos trans r soc lond b biol sci sep introduction speciation in plants and animals pattern and process abbott rj ritchie mg hollingsworth pm