title: Corrigia Obscura Sp. N. (Trematoda: Dicrocoeliidae) from the North American black duck.
abstract: Corrigia obscura sp. n. was found in the pancreatic ducts of a black duck, Anas rubripes. This is the first record of the genus Corrigia from an anseriform bird and from North America. Corrigia obscura differs from other Corrigia spp. by having a greater relative forebody length and greater relative body width. Noticeable hyperplasia and sloughing of the wall of the pancreatic ducts were associated with this infection.
mesh_terms: D000818:Animals; D004372:Ducks / Q000469:parasitology*; D009656:North America; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification*