Invasion

Invasion Description

1st Record: Alexandria (Hunters Point)/VA/Potomac River (1901, US National Museum of Natural History Colections, as V. viviparus). No recent records?

Geographic Extent

Seneca/MD/Potomac River (nontidal, (Clench 1962, Dundee 1974, US National Museum of Natural History Colections); Great Falls/MD/Potomac River (nontidalClench 1962, Dundee 1974, US National Museum of Natural History Colections); Washington/DC/Potomac River (Richards 1934; Clench 1962, Dundee 1974, US National Museum of Natural History Colections); Alexandria (Hunters Point)/VA/Potomac River (1901, US National Museum of Natural History Colections, as V. viviparus); Alexandria /VA/Potomac River (Little Hunting Creek, US National Museum of Natural History Colections, as V. viviparus) Mount Vernon/VA/Potomac River (Clench 1962, Dundee 1974, US National Museum of Natural History Colections);