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Título: | Biodiversity of Simulium metallicum sensu lato (Diptera: Simuliidae), a complex of Neotropical vectors associated with human onchocerciasis |
Autor: | Adler, Peter H. Borkent, Art Hamada, Neusa McCreadie, John William |
Palavras-chave: | Biodiversity Chromosome Disease Vector Fly Larva Morphology Parasitic Disease Phylogenetics Animals Cell Biodiversity Biological Functions Chromosome Rearrangement Controlled Study Costa Rica Disease Association Ecuador Female Human Larva Neotropics Nonhuman Onchocerciasis Pathophysiology Phylogeny Polytene Chromosome Simuliidae Simuliidae Horacioi Simuliidae Metallicum Simulium Metallicum Complex Sensu Stricto Simulium Metallicum Sensu Lato Animals Genetics Insect Vector Onchocerciasis Parasitology Simuliidae Transmission Costa Rica Ecuador Diptera Hexapoda Simuliidae Simulium Metallicum Animal Biodiversity Costa Rica Ecuador Humans Insect Vectors Larva Onchocerciasis Phylogeny Polytene Chromosomes Simuliidae |
Data do documento: | 2017 |
Revista: | Acta Tropica |
É parte de: | Volume 173, Pags. 171-179 |
Abstract: | The polytene chromosomes of 130 larvae of the Neotropical Simulium metallicum complex from Brazil, Costa Rica, and Ecuador revealed five cytoforms, including three (‘M’, ‘N’, and ‘O’) that are new and two (‘B’ and ‘J’) that represent range extensions of up to 850 km. The discovery of three new cytoforms brings the total number in the complex to 17. Cytoforms ‘B’, ‘J’, and ‘N’ are reproductively isolated from one another, and their species status is corroborated by morphological evidence. None of the three new cytoforms is known from current or historical onchocerciasis foci, although ‘M’ inhabits the periphery of the former Ecuadorian Santiago onchocerciasis focus a mere 30 km to the west. The number of fixed chromosomal differences, as many as 24, separating some members of the S. metallicum complex far exceeds that known between members of any other simuliid species complex. Two distinct groupings can be diagnosed within the S. metallicum complex, based on at least eight fixed chromosomal rearrangements and structural characters in the larval stage. Consequently, a recommendation is made to recognize the S. horacioi complex and the S. metallicum complex sensu stricto. Recognition of two separate complexes provides potential phylogenetic content with predictive power for understanding biological phenomena such as vector potential. © 2017 Elsevier B.V. |
DOI: | 10.1016/j.actatropica.2017.06.017 |
Aparece nas coleções: | Artigos |
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