Choanotrema is a genus of trematodes in the family Opecoelidae. It was formerly named Choanostoma Yamaguti, 1934. Species Choanotrema plectorhynchi (Yamaguti, 1934)Yamaguti, S. (1934). Studies on the helminth fauna of Japan. Part 2. Trematodes of fishes. I. Japanese Journal of Zoology, 5, 249–541. Choanotrema secundum (Durio & Manter, 1968)Durio, W. O. & Manter, H. W. (1968). Some digenetic trematodes of marine fishes of New Caledonia. Part II. Opecoelidae and Lepocreadiidae. The Journal of Parasitology, 54(4), 747.
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