@article {47710, title = {A new Neotibicen cicada subspecies (Hemiptera: Cicadidae) from the southeastern USA forms hybrid zones with a widespread relative despite a divergent male calling song}, journal = {Zootaxa}, volume = {4272}, year = {2017}, month = {Jul-05-2019}, pages = {529}, abstract = {

A morphologically cryptic subspecies of Neotibicen similaris (Smith and Grossbeck) is described from forests of the Apalachicola region of the southeastern United States. Although the new form exhibits a highly distinctive male calling song, it hybridizes extensively where it meets populations of the nominate subspecies in parapatry, by which it is nearly surrounded. This is the first reported example of hybridization between North American nonperiodical cicadas. Acoustic and morphological characters are added to the original description of the nominate subspecies, and illustrations of complex hybrid song phenotypes are presented. The biogeography of N. similaris is discussed in light of historical changes in forest composition on the southeastern Coastal Plain.

}, keywords = {acoustic behavior, hybrid zone, hybridization, parapatric distribution, sexual signals, speciation}, issn = {1175-5326}, doi = {10.11646/zootaxa.4272.410.11646/zootaxa.4272.4.3}, url = {http://www.biotaxa.org/Zootaxa/issue/view/zootaxa.4272.4}, author = {Marshall, David C. and Kathy B. R. Hill} } @article {11801, title = {Patterns and processes underlying evolutionary significant units in the Platypleura stridula L. species complex (Hemiptera: Cicadidae) in the Cape Floristic Region, South Africa}, journal = {Molecular Ecology}, volume = {16}, year = {2007}, pages = {2574-2588}, chapter = {2574}, abstract = {

Cicadas have been shown to be useful organisms for examining the effects of distribution, plant association and geographical barriers on gene flow between populations. The cicadas of the Platypleura stridula species complex are restricted to the biologically diverse Cape Floristic Region (CFR) of South Africa. They are thus an excellent study group for eluci- dating the mechanisms by which hemipteran diversity is generated and maintained in the CFR. Phylogeographical analysis of this species complex using mitochondrial DNA Cytochrome Oxidase I (COI) and ribosomal 16S sequence data, coupled with preliminary morphological and acoustic data, resolves six clades, each of which has specific host-plant associations and distinct geographical ranges. The phylogeographical structure implies simultaneous or near-simultaneous radiation events, coupled with shifts in host-plant associations. When calibrated using published COI and 16S substitution rates typical for related insects, these lineages date back to the late Pliocene \– early Pleistocene, coincident with vegetation change, altered drainage patterns and accelerated erosion in response to neotectonic crustal uplift and cyclic Pleistocene climate change, and glaciation-associated changes in climate and sea level.

}, keywords = {endemism, phylogeography, plant associations, sea-level change, speciation, vicariance}, doi = {10.1111/j.1365-294X.2007.03328.x}, author = {Ben W. Price and N. P. Barker and Martin H. Villet} }