Invasion

Invasion Description

1st Record: Alexandria/VA/Potomac River (Uhler and Lugger 1876)

Geographic Extent

VA/James River (Jenkins and Burkhead 1993, 1 tidal record); VA/Rappahannock River (Maurakis et al. 1987, 1 tidal record); Washington to the Wicomico River/DC-MD-VA/Potomac River (Uhler and Lugger 1876; Lippson et al. 1979; Killgore et al. 1989; Carmichael et al. 1992; Serafy et al. 1994; Ernst et al. 1995; Starnes et al. 2011; Kraus and Jones 2012); Susquehanna Flats/MD/Chesapeake Bay (Howarth 1961; Serafy et al. 1993); Edgewater/MD/Rhode River (Rob Aguilar, personal communication 2012); below Conowingo Dam/MD/Susquehanna River (McKeown 1984)