Abstract
A collection of dactylogyrid Monogenea from catostomid fishes taken in Lake Erie, Ontario, Canada, included Pellucidhaptor eriensis n. sp. from Carpiodes cyprinus and Moxostoma macrolepidotum; P. thelostea n.sp. from Moxostoma macrolepidotum and M. anisurum; P. angularis Kritsky and Hathaway, 1969 from Carpiodes cyprinus; P. micracanthus Kritsky, Leiby, and Shelton, 1972 from Carpiodes cyprinus; P. moxostomi Mergo and White, 1982 from Moxostoma anisurum (new Canadian record) and P. nasalis Dechtiar, 1969 from Catostomus commersoni. Pellucidhaptor eriensis is differentiated from other Pellucidhaptor species by the shape of the superficial root of the dorsal hamuli, the shape of the dorsal bar, and the configuration of the male copulatory apparatus. Pellucidhaptor thelostea is readily distinguished from other members of the genus by the sclerotized "wishbone"-shaped support of the male copulatory organ. Supplementary data are provided for the previously described species and an updated list of parasite–host records is included.
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