Invasion

Invasion Description

1st Record: Haverstraw/NY/Hudson River (1937, Rehder 1937; Jacobson 1953, 2 living specimens)

Geographic Extent

Newburgh, River Km 99/NY/Hudson River (1992, Walton 1996, upstream record); Haverstraw/NY/Hudson River (1937, Jacobson 1953); Croton Point Park/NY/Hudson River (1952, Jacobson 1953); Tarrytown/NY/Hudson River (1992, Walton 1996); Engelwood/NJ/Hudson River (River Km 24, 1953, Jacobson 1953); Harmon/NY/Hudson River (1952, ANSP 189398, Academy of Natural Sciences of Philadelphia 2008); River Km 55-87/NY/Hudson River (Ristich et al. 1977); Tappan Zee Bridge/NY/Hudson River (River Km 44, 2006,-2009, New York State Department of Transportation 2012)