Ichthyomyzon

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)