Ichthyomyzon is a genus of lampreys in the family Petromyzontidae, native to North America.
Species There are currently six recognized species in this genus: Ichthyomyzon bdellium (D. S. Jordan, 1885) (Ohio lamprey) Ichthyomyzon castaneus Girard, 1858 (Chestnut lamprey) Ichthyomyzon fossor Reighard & Cummins, 1916 (Northern brook lamprey) Ichthyomyzon gagei C. L. Hubbs & Trautman, 1937 (Southern brook lamprey) Ichthyomyzon greeleyi C. L. Hubbs & Trautman, 1937 (Mountain brook lamprey) Ichthyomyzon unicuspis C. L. Hubbs & Trautman, 1937 (Silver lamprey)
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