Species concepts and spéciation in insect herbivores: Planthopper case studies

Abstract

General biological and phylogenetic species concepts are compared and contrasted. They are applied to studies on insect herbivores and particularly to variation in populations of the planthop- pers Nilaparvata lugens and N. bakeri in Asia and Australia. Spéciation processes for these herbivores are discussed in the light of contrasting species concepts. Emphasis is placed on the evolution of reproductive isolation. © 1995 Taylor & Francis Group, LLC.