Loxoglypta secunda (V. Bertin, 1878) Red Sea
Moerella securiclata (FOSSIL) P.A. Maxwell, 1992 † New Zealand, Canterbury, Waimate
Arcopagia sedgwicii (FOSSIL) (O.G. Michelotti †) Italy, Piemonte
Tellina segregata (FOSSIL) W.H. Dall, 1900 † USA, Georgia, Decatur
Johnsonella seguinensis (FOSSIL) Garvie, 2013 † Texas, Milam County16,4 mm
Macoma sejugata (FOSSIL) (M. Yokoyama, 1924 †) Russia, Sakhalin
Arcopagia sellei (FOSSIL) A.E.M. Cossmann, 1886 † France, Paris Basin
Cadella semen (S.C.T. Hanley, 1845) Okinawa11,4 mm
Macoma seminuda (FOSSIL) K.B. Barinov & al.,1992 † Eastern Kamchatka
Herouvalia semitexta (FOSSIL) (A.E.M. Cossmann, 1886 †)
Cadella semitorta (G.B. Sowerby, 1867) Philippines, Leyte Island7 mm
Tellina senegalensis J.F. Gmelin, 1791 Angola75 mm
Senegona senegambiensis (A.E. Salisbury, 1934) Senegal, Dakar63,7 mm
Tellina serica (FOSSIL) T.A. Conrad, 1848 † USA, Mississippi32 mm
Tellina sericata (J.C. Melvill, 1898) Red Sea26 mm
Serratina serrata (G.B. Brocchi, 1814) Spain, Almeria37 mm
Serratina serrata subtriangula (FOSSIL) (F. Sacco, 1901 †) France, Aquitaine
Strigilla serrata O.A.L. Mörch, 1860 Costa Rica4 mm
Tellina serricostata S. Tokunaga, 1906 Fiji Islands32 mm
Tellinella severnsi M. Huber, A. Langleit& K. Kreipl, 2015
Macoma shiratoriensis (T. Matsubara, 1994)
Tellina sieboldii G.P. Deshayes, 1855 Japan, Kotoga beach
Macoma siliqua (C.B. Adams, 1852) Panama West33 mm
Tellina simiensis (FOSSIL) R.N. Nelson, 1925 † Western Kamchatka
Tellina similis J. de C. Sowerby, 1806 Florida21 mm
Macoma simizuensis (FOSSIL) Krishtofovich, 1957 † Russia, Kamchatka, Tigil'skiy rayon
Pseudopsammobia simplex (G.B. III Sowerby, 1894) Hong Kong
Strigilla sincera (S.C.T. Hanley, 1844) Jamaica
Finlayella sinuaris (FOSSIL) C.R. Laws, 1933 †
Tellina sinuata (L. Spengler, 1798) india, Rameshwaram53 mm
Nelltia skidgatensis (FOSSIL) (J.J.F. Whiteaves,1884 †)
Cadella smithi (H. Lynge, 1909) Thailand, Phetchaburi
Tellina snatolensis (FOSSIL) V.N. Sinelnikova, 1991 † Western Kamchatka
Tellina soledadensis (FOSSIL) G.D. Hanna, 1927 † United States, California, Orange
Psammotreta solenella (G.P. Deshayes, 1855) Northern Territory