Invasion

Invasion Description

:1st Record: Bay Farm Island/Alameda County/San Francisco Bay (1/28/1935, USNM, 134494, under rocks, above high tide line, with Actoniscus, as Porcellio littorinus), 1st Record: San Clemente Island/CA/Pacific Ocean (3/24/2019, iNatualist (019), 1st Record: Morro Bay/CA/Morro Bay (2019, i-naturalis 2019), 1st Record: Ocean Beach Park, Santa Barbara County/CA/Pacific Ocean (2014, i-Naturalist 2019), 1st Record: Oceano Dunes State Vehicular Recreation Area, San Luis Obispo County/CA/Pacific Ocean (2017, i-Naturalist 2019), 1st record: Sonoma County/CA/Bolinas Lagoon (1989, Garthwaite et al. 1992)

Geographic Extent

Bay Farm Island/Alameda County/San Francisco Bay (1/28/1935, USNM, 134494, under rocks, above high tide line, with Actoniscus, , as Porcellio littorinus, 12 specimens); 1980, Schultz et al. 1982, 260 specimens); San Mateo/CA/San Francisco Bay (5/23/2019, i-Naturalist 2019); 22 of 160 sites around the Bay/CA/San Francisco Bay (Garthwaite et al. 1992)., San Clemente Island/CA/Pacific Ocean (3/24/2019, iNatualist (019), Morro Bay/CA/Morro Bay (2019, i-naturalis 2019), Ocean Beach Park, Santa Barbara County/CA/Pacific Ocean (2014, i-Naturalist 2019); Goleta/CA/Pacific Ocean (2/12/1980, Schultz et al. 1982), Oceano Dunes State Vehicular Recreation Area, San Luis Obispo County/CA/Pacific Ocean, , i-Naturalist 2019), Sonoma County/CA/Bolinas Lagoon (1989, Garthwaite et al. 1992)