A total of 196 yellow perch, Perca flavescens (Percidae), from 3 locations (100 from Strawberry Light in September 2015, 73 from Clinton River Cutoff in November 2017, and 23 from New Baltimore in November 2017) in Lake St. Clair, Michigan, U.S.A., were examined for the digenetic trematode Phyllodistomum superbumStafford, 1904 (Gorgoderidae Looss, 1901). The prevalence, mean intensity, and mean abundance of P. superbum in yellow perch were highest at Strawberry Light (30%, 1.5, and 0.45, respectively) and lowest at Clinton River Cutoff (7%, 1.2, and 0.08, respectively). The maximum intensity of P. superbum varied from 2 to 5 worms per infected fish. Individuals of P. superbum infected the urinary bladder and ureters of perch. Lake St. Clair is a new locality record for P. superbum.
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Vol. 86 • No. 2