Littoraria aberrans (R.A. Philippi, 1846)
Lacuna abyssicola J.C. Melvill & R. Standen,1912
Afrolittorina acutispira (E.A. Smith, 1892)
Littorina aedilis (FOSSIL) (Münster in Goldfuss) †
Afrolittorina africana (C.F.F. von Kraussin R.A. Philippi, 1847)
Cremnoconchus agumbensis D.G. Reid, N.A. Aravind& N.A. Madhyastha, 2013
Littoraria albicans (W. Metcalfe, 1852)
Echinolittorina albicarinata (J.H. McLean, 1970)
Littorina aleutica W.H. Dall, 1872
Laevilitorina alta (A.W.B. Powell, 1940)
Bembicium altum (FOSSIL) (R. Tate, 1894 †)
Nodilittorina angiostoma (C.B. Adams, 1852)
Littoraria angulifera (J.B.P.A. Lamarck, 1822)
Littoraria angulifera lineata (J.F. Gmelin, 1791)
Echinolittorina angustior (O.A.L. Mörch, 1876)
Lacuna anomala (FOSSIL) A.E.M. Cossmann, 1882 †
Laevilacunaria antarctica (E.C. Von Martens, 1885)
Laevilitorina antarctica (E.A. Smith, 1902)
Laevilitorina antipodum (H. Filhol, 1880)
Austrolittorina antipodum (R.A. Philippi, 1847)
Tectarius antonii (R.A. Philippi, 1846)
Echinolittorina apicina (K.T. Menke, 1851)
Echinolittorina arabica (Assal, 1990)
Austrolittorina araucana (A.V.M.D. D'Orbigny,1840)
Littorina arcana C.J. Hannaford-Ellis,1978
Littoraria ardouiniana (P.M. Heude, 1885)
Littorina armoricensis (FOSSIL) Vasseur, 1881 †
Littoraria articulata (R.A. Philippi, 1846)
Echinolittorina aspera (R.A. Philippi, 1846)
Echinolittorina atrata (A. Adams, 1852)
Laevilitorina aucklandica (A.W.B. Powell, 1933)
Bembicium auratum (J.R.C. Quoy& J.P. Gaimard, 1834)
Nodilittorina australis (FOSSIL) (J.R.C. Quoy, 1826 †)
Echinolittorina australis (J.E. Gray, 1826)
Echinolittorina austrotrochoides D.G. Reid, 2007