Groves, Colin2015-12-131616-5047http://hdl.handle.net/1885/84565I argue strongly that the Phylogenetic Species Concept offers the only way of defining species that makes them testable, as any scientific hypothesis should be. The criticisms made by Zachos et al. (in press) are not cogent, and do not offer a means of testing species proposals. Nonetheless, their comments on species concepts in conservation do provide support to the value of the Phylogenetic Species ConceptKeywords: conservation management; deer; phylogenetics; species concept; Capricornis; Cervus; Oreotragus Capricornis; Cervus corsicanus; Oreotragus; Phylogenetic Species Concept; Species concepts in conservation201310.1016/j.mambio.2012.09.0092016-02-24