02133nas a2200217   4500008004100000245018900041210006900230300001400299490000700313520129700320653001301617653001901630653002301649653002101672653001501693653001501708100001901723700001901742700002301761856013101784       2007                        eng d00aPatterns and processes underlying evolutionary significant units in the <i>Platypleura stridula</i> L. species complex (Hemiptera: Cicadidae) in the Cape Floristic Region, South Africa0 aPatterns and processes underlying evolutionary significant units  a2574-25880 v163 a<p>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 &ndash; 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.</p>
10aendemism10aphylogeography10aplant associations10asea-level change10aspeciation10avicariance1 aPrice, Ben, W.1 aBarker, N., P.1 aVillet, Martin, H.  uhttps://bio.acousti.ca/zh-hans/content/patterns-and-processes-underlying-evolutionary-significant-units-platypleura-stridula-l