title: Tabanidae (Diptera) of Maranhão state, Brazil. V. Description of Protosilvius gurupi sp. n. (Pangoniinae, Pangoniini) and key to Protosilvius species.
abstract: Protosilvius gurupisp. n. (Tabanidae, Pangoniinae) is described and illustrated based on seven female and 53 male specimens collected in the Amazonian region at Reserva Biológica Gurupi, Centro Novo do Maranhão municipality, northwest Maranhão, Brazil. This is the first record of Protosilvius in northern Brazil and in the Amazon Basin. An illustrated key to all Protosilvius species is also presented.
authors.affiliation: Instituto Nacional de Pesquisas da Amazônia, Caixa Postal 2223, 69080-971 Manaus, Amazonas, Brazil.
authors.forename: José Albertino
authors.initials: JA
authors.lastname: Rafael
authors.forename: Dayse Willkenia Almeida
authors.initials: DW
authors.lastname: Marques
authors.forename: Francisco
authors.initials: F
authors.lastname: Limeira-de-Oliveira