Southern quahog clam
- kingdom: Animalia
- phylum: Mollusca
- class: Bivalvia
- order: Venerida
- family: Veneridae
- genus: Mercenaria
- species: Mercenaria campechiensis
Clewiston- Largo
- Saint James City
- Sarasota
Florida- Long Beach
Maryland- Port Aransas
- Port Isabel
Texas- Gloucester Point
- Yorktown
Virginia
United States