Description of Tabanus rondoniensis (Diptera: Tabanidae), a new species of horsefly from the State of Rond?nia, Brazil

Background The genus Tabanus Linnaeus has a worldwide distribution and is the richest in species; however, it is probably not monophyletic. In the Neotropical Region, its richness is certainly underestimated, mainly due to the large number of species and the absence of recent taxonomic revisions.