Sabanaea, Genus – synonym of Cingula, Genus
Sabanea, Genus – synonym of Rissoa, Genus
Sabulincola, Genus – synonym of Microhedyle, Genus
Saccella, Genus – synonym of Nuculana, Genus
Sacella, Genus – synonym of Nuculana, Genus
Sagittatus, Genus – synonym of Todarodes, Genus
Sasea, Genus – synonym of Lasaea, Genus
Saxicava, Genus – synonym of Hiatella, Genus
Scabrobittium, Genus – synonym of Bittium, Genus
Scaeoleda, Genus – synonym of Nuculana, Genus
Scala, Genus – synonym of Epitonium, Genus
Scalaria, Genus – synonym of Epitonium, Genus
Scalarius, Genus – synonym of Epitonium, Genus
Schizotrochus, Genus – synonym of Anatoma, Genus
Schwartzia, Genus – synonym of Rissoa, Genus
Schwengelia, Genus – synonym of Aclis, Genus
Scrobiculina, Genus – synonym of Tellina, Genus
Seguenziella, Genus – synonym of Alvania, Genus
Selva, Genus – synonym of Cuthona, Genus
Semibittium, Genus – synonym of Bittium, Genus
Semierycina, Genus – synonym of Hemilepton, Genus
Semperia, Genus – synonym of Emarginula, Genus
Serigea, Genus – synonym of Aegires, Genus
Serratina, Genus – synonym of Tellina, Genus
Serrula, Genus – synonym of Donax, Genus
Servatrina, Genus – synonym of Atrina, Genus
Sfaxiella, Genus – synonym of Rissoa, Genus
Similpecten, Genus – synonym of Hyalopecten, Genus
Sipho, Genus – synonym of Colus, Genus
Sipho, Genus – synonym of Puncturella, Genus
Siphonota, Genus – synonym of Aplysia, Genus
Skeneia, Genus – synonym of Skenea, Genus
Smithia, Genus – synonym of Mangelia, Genus
Smithiella, Genus – synonym of Mangelia, Genus
Solenaria, Genus – synonym of Solen, Genus
Solenarius, Genus – synonym of Solen, Genus
Solenia, Genus – synonym of Solen, Genus
Solenocurtus, Genus – synonym of Solecurtus, Genus
Solex, Genus – synonym of Solen, Genus
Solvaclathrus, Genus – synonym of Epitonium, Genus
Somalidacna, Genus – synonym of Crassostrea, Genus
Spathophora, Genus – synonym of Cardiomya, Genus
Sphaeronassa, Genus – synonym of Nassarius, Genus
Sphaerostoma, Genus – synonym of Tritonia, Genus
Sphenalia, Genus – synonym of Montacuta, Genus
Spinolyonsiella, Genus – synonym of Lyonsia, Genus
Spirolidium, Genus – synonym of Caecum, Genus
Spongyophylla, Genus – synonym of Hiatella, Genus
Spraticulus, Genus – synonym of Gibbula, Genus
Spurculus, Genus – synonym of Gibbula, Genus
Spurillidae, Familia – synonym of Aeolidiidae, Familia
Stabilima, Genus – synonym of Limatula, Genus
Stalagmium, Genus – synonym of Crenella, Genus
Stellaspina, Genus – synonym of Microhedyle, Genus
Stenosemus, Genus – synonym of Ischnochiton, Genus
Steromphala, Genus – synonym of Gibbula, Genus
Steromphalus, Genus – synonym of Gibbula, Genus
Stiliger, Genus – synonym of Calliopaea, Genus
Stilus, Genus – synonym of Cerithiella, Genus
Stomatulus, Genus – synonym of Gibbula, Genus
Stomega, Genus – synonym of Odostomia, Genus
Strigosella, Genus – synonym of Gibbula, Genus
Striotellina, Genus – synonym of Tellina, Genus
Strombella, Genus – synonym of Volutopsius, Genus
Stylidium, Genus – synonym of Bittium, Genus
Stylina, Genus – synonym of Pelseneeria, Genus
Subacmaea, Genus – synonym of Tectura, Genus
Subcultellus, Genus – synonym of Phaxas, Genus
Suborder, Subordo – synonym of Aeolidiina, Subordo
Suborder, Subordo – synonym of Arminina, Subordo
Suborder, Subordo – synonym of Dendronotina, Subordo
Suborder, Subordo – synonym of Doridina, Subordo
Subularia, Genus – synonym of Eulima, Genus
Subzeidora, Genus – synonym of Emarginula, Genus
Succella, Genus – synonym of Nuculana, Genus
Sulcosubularia, Genus – synonym of Eulima, Genus
Sulcotrivia, Genus – synonym of Trivia, Genus
Susania, Genus – synonym of Pleurobranchus, Genus
Synapticola, Genus – synonym of Devonia, Genus
Syndesmya, Genus – synonym of Abra, Genus
Syndosmya, Genus – synonym of Abra, Genus
Syphonia, Genus – synonym of Sphenia, Genus
Syphonopyge, Genus – synonym of Aplysia, Genus