Morpho-Molecular Features and Phylogenetic Relationships of Oschmarin, 1963 (Trematoda: Opisthorchiidae) from East Asia.

Adult trematodes of the genus were found in the gallbladders of ducklings that had been experimentally fed freshwater fishes of the genera and that were naturally infected by metacercariae. Some of the trematodes were identified as , whose morphology of developmental stages and molecular data had previously been described in detail. The other trematodes were confirmed as species on the basis of morphological features: subterminal oral sucker, vitelline follicles with interrupted bands, and rosette-shaped testes.