Invasion

Invasion Description

1st Record?: Coos Bay/OR/Isthmus Slough, Coos Bay) (1988, Hewitt 1993).
Note- Localized populations in Coos Bay resembled Japanese populations previously identified as D. mitsakurii, a synonym of D. listerianum (Hewitt 1993).

Geographic Extent

Coos Bay/OR/Isthmus Slough (Coos Bay) (1988, Hewitt 1993); OR/Coos Bay (2001, Ruiz et al., unpublished data)