Southern brook lamprey
- kingdom: Animalia
- phylum: Chordata
- class: Cephalaspidomorphi
- order: Petromyzontiformes
- family: Petromyzontidae
- genus: Ichthyomyzon
- species: Ichthyomyzon gagei
- Greenland
Arkansas- Varnado
Louisiana- Diamondhead
- Iuka
- Rawls Springs
Mississippi- Cleveland
Texas
United States