Molopophorus anglonanus (FOSSIL) F.M. Anderson †
Cantharus angsananus (FOSSIL) (K. Martin, 1921 †)
Neptunea angulata (FOSSIL) F.W. Harmer, 1914 †
Neptunea angulata (FOSSIL) (S.V. Wood, 1848 †)
Sulcosipho angulata (FOSSIL) (G.B. Brocchi, 1814 †)
Probuccinum angulatum A.W.B. Powell, 1951
Janiopsis angulosa (FOSSIL) (G.B. Brocchi, 1814 †)
Buccinum angulosum J.E. Gray, 1839
Buccinum angulosum normalis W.H. Dall, 1885
Buccinum angulosum subcostatum W.H. Dall, 1885
Buccinum angulosum transliratum W.H. Dall, 1919
Pisania angusta E.A. Smith, 1899
Phaenomenella angusta R. Hadorn & K. Fraussen,2006
Pseudoneptunea angusticostata (FOSSIL) (Melleville, 1843 †)
Buccinum aniwanum W.H. Dall, 1907
Engina annae G.T. Watters & K. Fraussen,2015
Austrocominella annae (FOSSIL) A.E. Ortmann, 1902 †
Cominella annandalei (FOSSIL) E.W. Vredenburg, 1925 †
Euthria annegretae Schoenherr & Rolán, 2017
Clea annesleyi W.H. Benson, 1861
Bailya anomala (R.B. Hinds, 1844)
Chlanidota anomala Y.I. Kantor& M.G. Harasewych, 2008
Solenosteira anomala (L.A. Reeve, 1847)
Prosipho antarctidis (J.P.L. Pelseneer, 1903)
Penion antarctocarinatus (FOSSIL) (J.D. Stilwell& Zinsmeister, 1992 †)
Neptunea antiqua (C. Linnaeus, 1758)
Neptunea antiqua alba J.G. Jeffreys, 1867
Neptunea antiqua browni P. Dautzenberg & H. Fischer,1912
Neptunea antiqua carinata F.W. Harmer, 1899
Neptunea antiqua rhodium W.H. Dall, 1919
Neptunea antiqua striata J.G. Jeffreys, 1867
Aeneator antorbitus (FOSSIL) (C.A. Fleming, 1955 †)
Latisipho aphelus (W.H. Dall, 1889)
Austrofusus apudalpha (FOSSIL) Finlay, 1926 †
Pollia aquitanensis (FOSSIL) (M.A. Peyrot, 1924 †)