According to USGS (2017), non-indigenous occurrences of this species are as follows: "Mid-Atlantic Region: various ponds in Connecticut and Massachusetts; Potomac River, Maryland; Cocheco River, New Hampshire; Delaware River, New Jersey; Hudson River and Niagara River (1931), New York; the Catawba, Deep, Haw, Neuse, Roanoke, Yadkin, and lower Pee Dee rivers in North Carolina (B. Jones, pers. comm); Schuykill River and Susquehanna River, Pennsylvania; Annaquatucket River, Rhode Island; and a few isolated locations in Maine and Virginia."
See USGS identification notes. Compare very similar Japanese Mystery Snail.
Potomac River, Susquehanna River
There are 11 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |