| Summary: | Background: Aquatic and semiaquatic Heteroptera occur on all continents except Antarctica and occupy a wide variety of habitats, including lentic and lotic water bodies, perennial or temporary. In the Neotropical Region, there is a lack of knowledge concerning the geographical distribution of most represented species, which can only be solved by the collection of specimens in under-studied areas and publication of new records and lists of species. New information: New records are presented for eleven species of Gerromorpha and ten Nepomorpha, including first records from Venezuela ( Brachymetra lata , Limnogonus hyalinus, Rhagovelia evidis , Tenagobia peruana , Limnocoris burmeisteri , L. fittkaui fittkaui , Placomerus micans , and Martarega gonostyla ), Venezuelan State of Bolívar ( Cylindrostethus palmaris , R. elegans , R. tenuipes , and Ambrysus stali ), the Brazilian State of Bahia ( Martarega bentoi ), Peru ( Euvelia lata ), and the Peruvian Region of Arequipa ( Microvelia pulchella ).
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