Invasion

Invasion Description

1st Record: Fairmont Park (Philadelphia)/PA/Delaware River (1909, Clench 1962; ANSP 98696, A9232, Academy of Natural Sciences of Philadelphia 2014)

Geographic Extent

Riverton (Burlington County)/NJ/Delaware River (Clench 1962); Fairmont Park, Philadelphia/PA/Delaware River (1909, Clench 1962; ANSP 98696, A9232, Academy of Natural Sciences of Philadelphia 2014); NY-PA-NJ/Delaware River Basin (Bilger et al. 2005)