Revision of the Dicranotropis hamata group (Auchenorrhyncha, Delphacidae) and remarks on the implication of chiral dimorphism in its history

摘要

A new species, Dicranotropis remaniaca, is described. Morphological differences between the new species and the closely related D. hamata (Boheman) and D. zenata Logvinenko are summarized. Chirality is discussed in view of hypothetical implications in the history of the D. hamata group and of the presence of the phenomenon in a supposed hybrid area between D. hamata and D. remaniaca in southwestern France. Zoogeographic and phylogenetic aspects are discussed using D. sagata Logvinenko as outgroup.