Stygobromus pizzinii
Stygobromus pizzinii, commonly called Pizzini's cave amphipod, is a troglomorphic species of amphipod in family Crangonyctidae. It is native to District of Columbia, Maryland, Pennsylvania and Virginia in the United States. References

Freshwater crustaceans of North America
Cave crustaceans
Crustaceans described in 1938
pizzinii