Elevation in rank of Spio butleri kurilensis to Spio kurilensis (the authors reported this as a new combination).
Bick, A.; Meißner, Karen. 2011. Redescription of four species of Spio and Microspio (Polychaeta, Spionidae) from the Kuril Islands and Peter the Great Bay, northwest Pacific. Zootaxa (2968): 39-56 available online athttp://www.mapress.com/zootaxa/list/2011/2968.html