Drillia allionii (FOSSIL) L.M.D. Bellardi, 1877 †
Clathrodrillia allyniana (L.G. Hertlein& A.M. Strong, 1951)
Splendrillia alticostata P.J. Fallon, 2016
Drillia altispira A.V. Sysoev, 1996
Acinodrillia amazimba R.N. Kilburn, 1988
Cerodrillia ambigua P.J. Fallon, 2016
Bellaspira amplicostata P.J. Fallon, 2016
Elaeocyma amplinucis J.H. McLean & L.H. Poorman,1971
Agladrillia anadelgado E. Rolán, P. Ryall& J. Horro, 2007
Orrmaesia ancilla (K.H.J. Thiele, 1925)
Fusiturricula andrei J.H. McLean & L.H. Poorman,1971
Clavus androyensis (L. Bozzetti, 2007)
Drillia angolensis N.H. Odhner, 1923
Splendrillia angularia F.E. Wells, 1995
Drillia angulosa (FOSSIL) (G.P. Deshayes †)
Splendrillia annectens (FOSSIL) Powell, 1942 †
Drillia annielonae (F. Nolf & J. Verstraeten,2007)
Splendrillia anomala (FOSSIL) A.W.B. Powell, 1942 †
Clathrodrillia anteaphanitoma (FOSSIL) (W.C. Mansfield, 1930 †)
Douglassia antillensis P.J. Fallon, 2016
Splendrillia aomoriensis (S. Nomura & K.M. Hatai,1940)
Splendrillia aoteana H.J. Finlay, 1930
Drillia aquanica (FOSSIL) A.A. Olsson, 1922 †
Drillia aquansis (FOSSIL) A.A. Olsson, 1922 †
Drillia aquatilis (L.A. Reeve, 1845)
Drillia arata (FOSSIL) T.A. Conrad, 1862 †
Cymatosyrinx arbela (W.H. Dall, 1919)
Lissodrillia arcas P.J. Fallon, 2016
Cruziturricula arcuata (L.A. Reeve, 1843)
Elaeocyma arenensis (L.G. Hertlein& A.M. Strong, 1951)
Splendrillia arga J.H. McLean & L.H. Poorman,1971
Splendrillia armata A.W.B. Powell, 1942
Fusiturricula armilda (W.H. Dall, 1908)
Drillia armilla K.H. Barnard, 1958
Drillia armoricensis (FOSSIL) A.E.M. Cossmann, 1896 †