Invasion

Invasion Description

1st Record: Conowingo Dam/MD/Susquehanna River (1972, Mckeown et al. 1984), 1st Record: 1st Record: NY/lower Hudson tributaries (Greeley 1936, cited by Mills et al. 1997; Daniels 2001; Daniels et al. 2005), 1st Record: Montgomery County/PA/Schuylkill River (1966, Academy of Natural Sciences of Philadelphia 1998)

Geographic Extent

NY-PA/Susquehanna Drainage; Conowingo Dam/MD/Susquehanna River (Mckeown et al. 1984); Edgewater/MD/Rhode River (2006, 2007, Rob Aguilar, personal communication); WV-VA-MD/Potomac Drainage; Stevensville/VA/ Mattaponi River (York Drainage), NY/upper Hudson River. Lower Hudson, Mohawk River (Mills et al. 1997; Daniels 2001; Daniels et al. 2005), Montgomery County/PA/Schuylkill River (1966, Academy of Natural Sciences of Philadelphia 1998); PA/Delaware River (Horwiz 1986); New Castle County/DE/Mill Creek (Raasch and Altemus 1991;)