Invasion

Invasion Description

1st Record: Wilson Bridge (Prince Georges County)/MD/Potomac River (1960, Dundee 1974)

Geographic Extent

; Susquehanna River State Park (Havre de Grace)/MD/Susquehanna River (tidal) ((2000, Fofonoff, personal observations); Wilson Bridge (Prince Georges County)/MD/Potomac River (1960, Dundee 1974); Jones Point (Alexandria)/VA/Potomac River (Dundee 1974);; Dyke Marsh (Alexandria)/VA/Potomac River (1997, Fofonoff, personal observations); Richmond/VA/Westhampton Lake, James River tributary (10/31/2017, USGS Nonindigenous Aquatic Species Program 2017). Not found in recent collections from the Ptomac River Ryan 2015; (Bocxlaer and Strong 2016; Fowler et 2022).