title: The Secondary Contact Zone of Phylogenetic Lineages of the Philaenus spumarius (Hemiptera: Aphrophoridae): An Example of Incomplete Allopatric Speciation
abstract: Previous studies on the phylogeography of the meadow spittlebug Philaenus spumarius (L.) (Hemiptera: Aphrophoridae) suggest the existence of a contact zone of its main phylogenetic lineages along mountain chains in Europe and western Asia. This study presents a detailed examination of the population genetics of P. spumarius within the Carpathian Mountains. The main objective was to determine whether the populations inhabiting that area consist of individuals belonging to different genetic units 
journal: Journal of Insect Science