title: A new species of Heterocotyle Scott, 1904 (Monogenea: Monocotylidae) from the gills of Dasyatis guttata (Dasyatidae) in southwestern Atlantic waters off Rio de Janeiro, Brazil.
abstract: Heterocotyle sulamericana n. sp. is described from the gills of Dasyatis guttata (Bloch & Schneider) caught off the coast of Brazil near Rio de Janeiro. This species can be distinguished from all other members of Heterocotyle Scott, 1904 by a combination of the morphology of the male copulatory organ, which is a short, slightly curved, sclerotised tube with no accessory piece, and the haptor, which has a single ridge surmounting all septa. This is the first Heterocotyle species to be described from the southwestern Atlantic.
authors.affiliation: Laboratório de Avaliação e Promoção da Saúde Ambiental Instituto Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, 21040-900, Brazil. cpsantos@ioc.fiocruz.br
authors.forename: Cláudia Portes
authors.initials: CP
authors.lastname: Santos
authors.forename: Antônia Lúcia
authors.initials: AL
authors.lastname: Santos
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Cunha
authors.forename: Leslie A
authors.initials: LA
authors.lastname: Chisholm
mesh_terms: D000825:Animal Structures / Q000648:ultrastructure; D000818:Animals; D001938:Brazil / Q000453:epidemiology; D005393:Fish Diseases / Q000453:epidemiology / Q000469:parasitology; D005880:Gills / Q000469:parasitology*; D008297:Male; D018613:Microscopy, Confocal; D010986:Platyhelminths / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification; D013045:Species Specificity; D014201:Trematode Infections / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*