Invasion

Invasion Description

1st Record: Near Trenton/NJ/Delaware River (1873, Abbott 1877)

Geographic Extent

Trenton-Philadelphia-Wilmington/NJ-PA-DE/Delaware River (Abbott 1877; Horwitz 1986; Raasch, and Altemus 1991; Raasch 1996; Weisberg et al. 1996); DE/Appoquinimink, Blackbird Creeks; NJ/Alloway Creek (Smith 1971)