Invasion

Invasion Description

1st Record? PA/Delaware River (Fowler 1919)

Geographic Extent

Trenton-Philadelphia-Wilmington/NJ-PA/Delaware River (Horwitz 1986; Weisberg et al. 1996); DE/Appoquinimick Creek (Smith 1971); NJ/Alloway Creek; PA/Schuylkill River (Fairchild et al. 1998)