Invasion

Invasion Description

1st record: Boston/MA/Boston Harbor (Gould 1841, occasional), but present as shells in 5000 yr-old sediment (Johson et al. 1942)

Geographic Extent

Boston/MA/Boston Harbor (Gould 1841); ME/Casco Bay (Verrill and Smith 1874); ME/Damariscotta River (1895, Wentworth 1895, cited by Carriker 1955); New Brunswick/Passamaquoddy Bay (Whiteaves 1901, cited by Carriker 1955); Nova Scotia/Minas Basin, Bay of Fundy (Whiteaves 1901, cited by Carriker 1955)