Mohrensternia waldhofensis (FOSSIL) T. Kowalke& M. Harzhauser, 2004 †
Pusillina wallacei (W.R.B. Oliver, 1915)
Cingula wallichi (E.A. Smith, 1890)
Simulamerelina wanawana (E.A. Kay, 1979)
Alvania wareni (J. Templado & E. Rolán,1986)
Pusillina watsoni F. Nordsieck, 1972
Alvania weinkauffi G. Schwartzin H.C. Weinkauff, 1868
Alvania weinkauffi jacobusi M. Oliverio, B. Amati& I. Nofroni, 1986
Cingula whitechurchi (W.H. Turton, 1932)
Alvania whitleyi (FOSSIL) Bell, 1898 †
Manzonia wilmae R.G. Moolenbeek& M.J. Faber, 1987
Attenuata wilsonensis (J.H. Gatliff& C.J. Gabriel, 1913)
Rissoa winkleri (FOSSIL) Müller, 1851 †
Cingula winslowae (P. Bartsch, 1928)
Punctulum wyvillethomsoni (H.B.S. Friele, 1877)
Benthonellania xanthias (R.B. Watson, 1886)
Manzonia xicoi E. Rolán, 1987
Alvania yamatoensis K. Hasegawa, 2014
Onoba zebina (FOSSIL) (Finlay, 1930 †)
Alvania zetlandica (G. Montagu, 1815)
Alvania zibinica (FOSSIL) D. Pantanelli, 1888 †
Rissoa ziga (FOSSIL) A. De Gregorio, 1890 †
Alvania ziliolii (FOSSIL) M.M. Brunetti & G. Vecchi,2012 †
Alvania zoderi H.J. Hoenselaar & J. Goud,1998
Rissoa zosta (FOSSIL) J.F. Bayan, 1873 †
Alvania zylensis S. Gofas & A. Warén, 1982