Invasion

Invasion Description

1st Record: Weems/VA/Rappahannock River ('swimming freely in the tow', 1933 (USNM 78895, United States National Museum of Natural History 2009)

Geographic Extent

Weems/VA/Rappahannock River ('swimming freely in the tow', 1933 (USNM 78895, United States National Museum of Natural History 2009)Takoma Park/MD/Potomac River Drainage (1937, USNM 78140, United States National Museum of Natural History 2009); Norfolk/VA/Bureau of Plant Quarantine aquarium (1936, United States National Museum of Natural History 2009); Washington/DC