Invasion

Invasion Description

1st record: CA/Sacramento-San Joaquin Delta (1959, Reigel 1959, cited by Cohen and Carlton 1995) 1st Watershed record: San Francisco County/CA (1898, Kimsey 1982, cited by Cohen and Carlton 1995), Assumed to be widespread in streams leading to the Bay, 1st Record? Carmel/CA/Carmel River (2 miles from the Pacific Ocean, Reigel 1959), 1st Record? CA/Little Sur River (1 mile from the Pacific Ocean, Riegel 1959)

Geographic Extent

Yount Cross Road E of Yountville/CA/Napa River (1975. USNM 176805, US National Museum of Natural History 2007, in upper Napa watershed); CA/Sacramento-San Joaquin Delta (1959, Reigel 1959, cited by Cohen and Carlton 1995); CA/San Francisco County (Kimsey 1982, cited by Cohen and Carlton 1995); Mill Valley/CA/Widow Reed Creek, Richardson bay drainage (1975, USNM 176836, US National Museum of Natural History 2007), Yount Cross Road E of Yountville/CA/Napa River (USNM 176805, US National Museum of Natural History 2007, in upper Napa watershed), Carmel/CA/Carmel River (2 miles from the Pacific Ocean, Reigel 1959), CA/Little Sur River (1 mile from the Pacific Ocean, Riegel 1959)