Amamibalcis yessonensis Rybakov & Yakovlev, 1993 (basis of record)
Anisus centrifugus (Westerlund, 1897) accepted as Gyraulus centrifugus (Westerlund, 1897) (basis of record)
Chlamys asiatica Scarlato, 1981 (additional source)
Conchocele scarlatoi Ivanova & Moskalets, 1984 (additional source)
Cryptochiton stelleri (Middendorff, 1847) (basis of record)
Cyrtodaria kurriana Dunker, 1861 (basis of record)
Dosinia scabriuscula (R. A. Philippi, 1847) (additional source)
Latisipho georgianus (Dall, 1921) (additional source)
Leionucula Quenstedt, 1930 † (basis of record)
Leptochiton assimilis (Thiele, 1909) (basis of record)
Leptochiton hakodatensis (Thiele, 1909) (basis of record)
Littorina kasatka D. Reid, Zaslavskaya & Sergievsky, 1991 (basis of record)
Lyonsia gagarae Scarlato & Kafanov, 1988 (basis of record)
Mopalia retifera Thiele, 1909 (additional source)
Obesotoma gigantea (Mörch, 1869) (basis of record)
Obesotoma starobogatovi Bogdanov, 1990 (basis of record)
Obesotoma tumida (Posselt, 1898) (basis of record)
Placiphorella Dall, 1879 (additional source)
Placiphorella borealis Pilsbry, 1893 (additional source)
Portlandia aestuariorum (Mosevich, 1928) (basis of record)
Retusa pertenuis (Mighels, 1843) (basis of record)
Retusophiline lima (T. Brown, 1827) (basis of record)
Schizoplax brandtii (Middendorff, 1847) (basis of record)