Invasion

Invasion Description

!st Record: canal, Troy/NY/Hudson River (4/1879, #116841, University of Michigan Zoology Museum 2013)

Geographic Extent

canal, Troy/NY/Hudson River (4/1879, #116841, University of Michigan Zoology Museum 2013); Mohawk/NY/Mohawk River (1888, Strayer 1987, transplanted by a collector form Oswego NY, Lake Ontario); Dutchess County/NY/Hudson River (1892, Strayer 1897) Saratoga-Westchester Counties/NY/Hudson River (Strayer 1987, abundant); Poughkeepsie to Albany/NY/Hudson River (2008, Coote and Strayer 2009, only one specimen); Cruger Island, Dutchess County/NY/Hudson River (1996, USNM 883969, US National Museum of Natural History 2008; Strayer and Smith 2000)