Gorgoderid trematodes (Digenea: Gorgoderidae) from the urinary bladder of frogs in Korea.

Two species of the family Gorgoderidae (Trematoda: Digenea), Gorgodera japonica Yamaguti, 1936 and Gorgoderina bombinae Yu & Lee, 1983 were collected from the urinary bladder of frogs captured from various localities in Korea. The morphology of each species is described and illustrated. Gorgodera japonica differs from G. cygnoides by having deeply branched vitellaria. Gorgoderina bombinae is considered a valid species.