Alvania alboranensis A. Peñas & E. Rolán, 2006
Setia alboranensis A. Peñas & E. Rolán, 2006
Rissoa albugo R.B. Watson, 1873
Setia alexandrae S.P. Ávila & J. Cordeiro,2014
Manzonia alexandrei S. Gofas, 2010
Onoba alfredensis (P. Bartsch, 1915)
Alvania algeriana (T.A. de M. Monterosato,1877)
Onoba algida W.F. Ponder & H.W. Worsfold,1994
Alvania aliceae B. Amati, 2014
Rissoa alienocurta (FOSSIL) P. Lozouet, 1998 †
Rissoa alleryi (F. Nordsieck, 1972)
Alvania allixi (FOSSIL) A.E.M. Cossmann, 1919 †
Alvania almo (P. Bartsch, 1911)
Onoba alpha (A.W.B. Powell, 1955)
Benthonellania alvanioides Oliver & Rolán, 2017
Crisilla alvarezi J. Templado & E. Rolán,1994
Cingula alvearium (R.B. Watson, 1886)
Setia amabilis (É.A.A. Locard, 1886)
Alvania amatii M. Oliverio, 1986
Ihungia amberleya (FOSSIL) J. Marwick, 1931 †
Rissoa ambigua (FOSSIL) Harmer †
Setia ambigua (G.A. Brugnone, 1873)
Pusillina amblia (R.B. Watson, 1886)
Parashiela ambulata C.F. Laseron, 1956
Haurakia amica (K.H.J. Thiele, 1925)
Onoba amissa W.F. Ponder & H.W. Worsfold,1994
Alvania amoena (FOSSIL) C. Tabanelli, Bongiardino& I. Perugia, 2011 †
Crisilla amphiglypha P. Bouchet & A. Warén,1993
Alvania ampulla (FOSSIL) (Eichwald, 1853) †
Pseudosetia amydralox P. Bouchet & A. Warén,1993
Alvania anabaptizata (FOSSIL) Boettger, 1906 †
Onoba analoga A.W.B. Powell, 1937
Onoba anderssoni (H. Strebel, 1908)
Alvania andraldensis (FOSSIL) P. Lozouet, 1998 †
Mohrensternia andrusovi (FOSSIL) (Iljina in Roshka,1973 †)