Leucosyrinx amycus W.H. Dall, 1919 California, Monterey Bay
Hindsiclava andromeda (W.H. Dall, 1919) Costa Rica59,4 mm
Crassispira angelettii L. Bozzetti, 2008 Madagascar, Tolagnaro9,4 mm
Naudedrillia angulata R.N. Kilburn, 1988
Sediliopsis angulata (FOSSIL) (Martin, 1904 †)
Crassispira angulosa (FOSSIL) (G.P. Deshayes, 1834 †) France, Paris Basin6,8 mm
Crassispira angulosa acyensis (FOSSIL) A.E.M. Cossmann, 1889 † France, Paris Basin
Leucosyrinx angusteplicata (H. Strebel, 1905) Falkland Islands11 mm
Inquisitor angustiliratus A.V. Sysoev, 1996
Inquisitor angustus J.T. Kuroda, T. Habe& K. Oyama, 1971 China, Zhejiang70,2 mm
Brachytoma annandalei (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Magway, Thayetmyo
Crassispira annella (FOSSIL) W.P. Woodring, 1928 † Jamaica, Saint Thomas
Crassispira ansonae (F.E. Wells, 1990) Western Australia
Conorbela antarctica (H. Strebel, 1908) Antarctic Peninsula, Graham Land28,2 mm
Hindsiclava antealesidota (FOSSIL) (W.C. Mansfield, 1930 †) USA, Florida, Leon
Comitas anteridion (R.B. Watson, 1881) South Africa, Cape Agulhas27,5 mm
Antiplanes antigone (W.H. Dall, 1919) America
Lioglyphostoma antillarum (A.V.M.D. D'Orbigny,1842) Belize
Crassispira apicata (L.A. Reeve, 1845) Panama East10,5 mm
Carinodrillia apitoa L.F. Corea, 1934 Puerto Rico
Hindsiclava appelii (H.C. Weinkauff& W. Kobelt, 1876)
Crassispira appressa (P.P. Carpenter, 1864) Mexico, Nayarit14 mm
Crassispira apta K.H.J. Thiele, 1925
Comitas arcana (E.A. Smith, 1899) Indo-Pacific
Monilispira archeri (FOSSIL) A.A. Olsson& A. Harbison, 1953 † Florida
Leucosyrinx archibenthalis (A.W.B. Powell, 1969) Philippines, Mindanao
Inquisitor arctatus R.N. Kilburn, 1988 South Africa38,8 mm
Inquisitor armillatus P. Stahlschmidt& K. Fraussen, 2014 Philippines, Palawan Island
Pilsbryspira arsinoe (W.H. Dall, 1919) Mexico, Baja California9 mm
Funa asra R.N. Kilburn, 1988 South Africa, Natal53 mm
Crassispira aster P. Lozouet, 2015
Crassispira asthenes M.J. Faber, 2007 Netherlands Antilles, Aruba11,4 mm
Otitoma astrolabensis S.G. Wiedrick, 2014 Fiji Islands6 mm
Pilsbryspira aterrima (G.B. I Sowerby, 1834) Costa Rica10 mm
Pilsbryspira atramentosa (E.A. Smith, 1882) Costa Rica17 mm