A total of 55 adult white bass, Morone chrysops (Rafinesque, 1820) (Moronidae), collected in May and June 2014 from Anchor Bay, Lake St. Clair, Michigan, U.S.A., were examined for intestinal helminths. Of those found, 2 trematode species (Allacanthochasmus artus and Allacanthochasmus varius) were of interest due to their high prevalences and intensities. Allacanthochasmus artus infected all white bass with a mean intensity ± SD of 203.5 ± 243.9, and A. varius infected 53 white bass with a mean intensity ± SD of 263.9 ± 202.1 and mean abundance ± SD of 262.8 ± 198.1. Individuals of A. artus and A. varius were primarily found in the anterior and posterior intestine, respectively. Fifty-three white bass were concurrently infected with A. artus and A. varius. Allacanthochasmus artus and A. varius are reported for the first time from white bass in Lake St. Clair, and their mean intensities are the highest reported to date in this fish host from the Great Lakes.
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Vol. 84 • No. 1