A survey of gill parasites was conducted in July 2019 on a small sample of cypress minnow, Hybognathus hayi Jordan, from Calion Lake, Union County, Arkansas (Ouachita River drainage). Six of 9 (67%) specimens harbored parasites, including ciliates Ichthyophthirius multifiliis Fouquet, 1876, and an undetermined Trichodina sp., a myxozoan, Myxobolus sp., and a monogenean, Dactylogyrus nuchalis Wood and Mizelle, 1957, in 2 (22%). Dactylogyrus hankinsoni Hanek, Molnar, and Fernando, 1975, was found in 3 (33%) of the host specimens. All 5 taxa of these gill-inhabiting parasites are reported for the first time from H. hayi, and the monogeneans are documented as new geographic distribution records in Arkansas.
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Vol. 89 • No. 2