Turritella alumensis (FOSSIL) W.C. Mansfield, 1930 †
Palmerella alveata (FOSSIL) (T.A. Conrad, 1854 †)
Batillona amara (FOSSIL) Finlay, 1927 †
Turritella ambulacrum (FOSSIL) Sowerby, 1846 †
Omalaxis ammonoides (FOSSIL) L.J. Morlet, 1885 †
Omalaxis ammonoides cresnensis (FOSSIL) L.J. Morlet, 1885 †
Turritella anactor S.S. Berry, 1957
Turritella anceps (FOSSIL) Woods,in Bosworth, 1922 †
Neohaustator andenensis (Y. Otuka, 1934)
Neohaustator andenensis tsushimaensis T. Kotaka, 1951
Turritella andersoni (FOSSIL) R.E. Dickerson, 1916 †
Vermicularia anguillina (FOSSIL) G.P. Deshayes, 1861 †
Turritella angusta (FOSSIL) R.A. Philippi, 1887 †
Turritella annulata L.C. Kiener, 1843
Peyrotia ansarii (FOSSIL) Abbass, 1967 †
Turritella antigona (FOSSIL) C.J. Maury, 1930 †
Turritella apicalis (FOSSIL) A. Heilprin, 1887 †
Turritella apita (FOSSIL) A. De Gregorio, 1890 †
Turritella aquitanica (FOSSIL) R. Tournouer, 1874 †
Turritella aquitaniensis (FOSSIL) R. Tournouer, 1874 †
Tomyris aralica (FOSSIL) Michailovski, 1912 †
Archimediella archimedis (A. Brongniart, 1823)
Palmerella arenicola (FOSSIL) (T.A. Conrad, 1865 †)
Turritella arethusa (FOSSIL) C.J. Maury, 1930 †
Turritella arsenei (FOSSIL) Briart & Cornet, 1873 †
Turritella ashtamudensis (FOSSIL) M. Harzhauser, 2014 †
Turritella aspera E. Sismonda in C. Mayer,1868
Turritella asperula (FOSSIL) Brogniart, 1823 †
Turritella assimilis (FOSSIL) Sowerby, 1840 †
Colpospira atkinsoni R. Tate & W.L. May, 1900
Turritella atlantica (FOSSIL) Bohm & Weisfermel, 1913 †
Turritella attenuata L.A. Reeve, 1849
Turritella auricincta von Martens, 1882
Turritella aurocincta E.C. Von Martens, 1882
Colpospira australis (J.B.P.A. Lamarck, 1822)