title: Udonella australis n. sp. (Monogenea), an epibiont on sea-lice from native fish off southern Chile.
abstract: Udonella australis n. sp., an epibiont monogenean living on caligid copepods that infest a native fish, Eleginops maclovinus (Valenciennes), off Chile, South America is described. The species can be separated from other species by its difference in size, especially body size, and the distribution of cephalic glands, vitelline follicles and genital organs. Egg-size is intermediate in comparison with that of other species. The posterior attachment mechanism consists of few muscle fibres and clumped cement-producing glands. All previous descriptions of Udonella caligorum Johnston, 1835 from off Chile correspond to this new species.
authors.affiliation: Universidad de Los Lagos, Departamento de Recursos Naturales y Medio Ambiente, Casilla 557, Puerto Montt, Chile.
authors.forename: Juan
authors.initials: J
authors.lastname: Carvajal
authors.forename: Fabiola
authors.initials: F
authors.lastname: Sepúlveda
mesh_terms: D000818:Animals; D002677:Chile; D003445:Crustacea / Q000469:parasitology*; D005260:Female; D005399:Fishes / Q000469:parasitology*; D008297:Male; D008855:Microscopy, Electron, Scanning; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification*