New York Natural Heritage Program
Watercress Snail
Fontigens nickliniana (I. Lea, 1838)
Gastropods

New York State Distribution [-]
This species may still occur in a handful of localities in extreme western Erie and Niagara Counties.

Global Distribution [-]
The range of this freshwater snail is highly disjunct. There is a Great Lakes segment, primarily in western Michigan, northwestern Indiana and adjacent Illinois and eastern Wisconsin. The Appalachian segment runs from central Alabama to central Pennsylvania, with a possible extension into far western New York. These two distinct distributions might be the modern expression of separate glacial refugia as it is for many other species with similar disjunct distributions in the eastern U.S.
Best Places to See
• Niagara Falls (Niagara County)