Invasion

Invasion Description

1st Tidal Records: Dorchester County/MD/Little Blackwater River (2006, USGS Nonindigenous Aquatic Species Program 2017)

1st Nontidal Record?: Hebron (Worcester County) /MD/Wicomico River drainage (1980, Associated Press 1986; Harrell 1987, as Procambarus acutus )

Geographic Extent

1st Tidal Records: Charles County/MD/Mattawoman Creek (2006, USGS Nonindigenous Aquatic Species Program 2017); Charles County/MD/Mallows Bay (2006, USGS Nonindigenous Aquatic Species Program 2017); Dorchester County/MD/Little Blackwater River 2006, USGS Nonindigenous Aquatic Species Program 2017)

Nontidal Records: Harford County/MD/Susquehanna River (1997-2012, USGS Nonindigenous Aquatic Species Program 2017); Harford County/MD/Bush River (1996-2012, USGS Nonindigenous Aquatic Species Program 2017); Baltimore County-Baltimore City/MD/Gunpowder River (1996-2012, USGS Nonindigenous Aquatic Species Program 2017); Baltimore-Carroll Counties/MD/Patapsco (1995-2012, USGS Nonindigenous Aquatic Species Program 2017); Howard-Anne Arundel-Prince Georges County (1997, USGS Nonindigenous Aquatic Species Program 2017); Frederick-Montgomery Counties (1996-2012, USGS Nonindigenous Aquatic Species Program 2017); Kent County/MD/Chester River (2006, USGS Nonindigenous Aquatic Species Program 2017)