title: A new species of Nasicola Yamaguti, 1968 (Monogenea: Capsalidae) from the nasal cavities of Thunnnus obesus and a redescription of N. klawei (Stunkard, 1962) from T. albacares off Brazil.
abstract: Two species of Nasicola Yamaguti, 1968 are described from the nasal cavities of tunas ( Thunnus spp.) from off the coast of Brazil: N. brasiliensis n. sp. from T. obesus (Lowe) and the type-species, N. klawei (Stunkard, 1962), from T. albacares (Bonn.). The new species is differentiated from N. klawei on the basis of the large number of testes and from N. hogansi Wheeler & Beverley-Burton, 1986 by its greater body-size, proportionately smaller haptor and smaller number of marginal spines. The host-specificity of Nasicola spp. is commented upon.
authors.affiliation: Laboratório de Helmintos Parasitos de Peixes, Departamento de Helmintologia, Instituto Oswaldo Cruz, Av. Brazil 4365, 21045-900, Rio de Janeiro, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Kohn
authors.forename: M F
authors.initials: MF
authors.lastname: Baptista-Farias
authors.forename: A L
authors.initials: AL
authors.lastname: dos Santos
authors.forename: D I
authors.initials: DI
authors.lastname: Gibson
mesh_terms: D000818:Animals; D001938:Brazil; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning; D009296:Nasal Cavity / Q000469:parasitology; D014200:Trematoda / Q000033:anatomy & histology*; D014413:Tuna / Q000469:parasitology*