First records of the introduced marine bivalve Theora lubrica A. Gould, 1861 from Asturias, NW Spain (Semelidae)

The first records of fhe introduced marine bivalve Theora lubrica A. Gould, 1861 from Gijón and Avilés in Asturias are presented; the first Spanish records outside the Basque Country. It is quite likely that it is currently widespread in harbours and marinas in NW Spain, but has been overlooked or misidentified as an Abra species.