Sabella alveolata Linnaeus, 1767 – synonym of Sabellaria alveolata
Sabella analis – synonym of Euchone analis
Sabella analis Kröyer, 1856 – synonym of Euchone analis
Sabella candela – synonym of Jasmineira candela
Sabella candela Grube, 1863 – synonym of Jasmineira candela
Sabella crassicornis – synonym of Bispira crassicornis
Sabella crassicornis M. Sars, 1851 – synonym of Bispira crassicornis
Sabella elegans – synonym of Bispira crassicornis
Sabella elegans Bush, 1904 – synonym of Bispira crassicornis
Sabella granulata – synonym of Pectinaria granulata
Sabella granulata Linnaeus, 1767 – synonym of Pectinaria granulata
Sabella lumbricalis – synonym of Nicomache lumbricalis
Sabella lumbricalis Fabricius, 1870 – synonym of Nicomache lumbricalis
Sabella neglecta – synonym of Potamilla neglecta
Sabella neglecta M. Sars, 1851 – synonym of Potamilla neglecta
Sabella nordenskioeldi – synonym of Bispira crassicornis
Sabella nordenskioeldi McIntosh, 1916 – synonym of Bispira crassicornis
Sabella papillosa – synonym of Euchone papillosa
Sabella papillosa M. Sars 1851 – synonym of Euchone papillosa
Sabella pavonina Savigny, 1822 – synonym of Sabella pavonina
Sabella penicillus – synonym of Sabella pavonina
Sabella penicillus Auct. non Linneaus, (1758) – synonym of Sabella pavonina
Sabella spetsbergensis – synonym of Bispira crassicornis
Sabella spetsbergensis Malmgren, 1865 – synonym of Bispira crassicornis
Sabella? Octocirrata Sars, 1835 – synonym of Sabellides octocirrata
Sabellaria alveolata Malmgren, 1867 – synonym of Sabellaria alveolata
Sabellaria spinulosa Leuckart, 1849 – synonym of Sabellaria spinulosa
Sabellides borealis Sars, 1856 – synonym of Sabellides borealis
Sabellides cristata – synonym of Melinna cristata
Sabellides cristata Sars, 1851 – synonym of Melinna cristata
Sabellides octocirrata Malmgren, 1865 – synonym of Sabellides octocirrata
Sabellides sexcirrata – synonym of Samytha sexcirrata
Sabellides sexcirrata Sars, 1856 – synonym of Samytha sexcirrata
Sacconereis helgolandica – synonym of Autolytus prolifer
Sacconereis helgolandica Müller in Quatrefages, 1865 – synonym of Autolytus prolifer
Salmacina aedificatrix – synonym of Salmacina dysteri
Salmacina aedificatrix Claparède, 1870 – synonym of Salmacina dysteri
Samytha sexcirrata Malmgren, 1865 – synonym of Samytha sexcirrata
Sarsonuphis fiordica – synonym of Paradiopatra fiordica
Sarsonuphis fiordica Fauchald, 1982 – synonym of Paradiopatra fiordica
Sarsonuphis quadricuspis – synonym of Paradiopatra quadricuspis
Sarsonuphis quadricuspis Fauchald, 1982 – synonym of Paradiopatra quadricuspis
Scalibregma inflatum Rathke, 1843 – synonym of Scalibregma inflatum
Scalisetosus assimilis – synonym of Adyte pellucida
Scalisetosus assimilis Auctt. – synonym of Adyte pellucida
Scalisetosus pellucidus – synonym of Adyte pellucida
Scalisetosus pellucidus Fauvel, 1923 – synonym of Adyte pellucida
Schistomeringos eliasoni – synonym of Parougia eliasoni
Schistomeringos eliasoni Oug, 1978 – synonym of Parougia eliasoni
Schistomeringos subaequalis – synonym of Ougia subaequalis
Schistomeringos subaequalis Oug, 1978 – synonym of Ougia subaequalis
Scione lobata – synonym of Axionice maculata
Scione lobata Malmgren, 1866 – synonym of Axionice maculata
Scionella lornensis – synonym of Pistella lornensis
Scionella lornensis Pearson, 1969 – synonym of Pistella lornensis
Scolecolepis oxycephala – synonym of Aonides oxycephala
Scolecolepis oxycephala Malm, 1874 – synonym of Aonides oxycephala
Scolecolepis squamata – synonym of Scolelepis squamata
Scolecolepis squamata Michaelsen, 1896 – synonym of Scolelepis squamata
Scolecolepis viridis – synonym of Marenzelleria viridis
Scolecolepis viridis Verrill, 1873 – synonym of Marenzelleria viridis
Scolecolepis vulgaris – synonym of Malacoceros vulgaris
Scolecolepis vulgaris Michaelsen, 1896 – synonym of Malacoceros vulgaris
Scolelepis bonnieri Hartmann-Schröder & Stripp, 1968 – synonym of Scolelepis bonnieri
Scolelepis ciliata – synonym of Malacoceros tetracerus
Scolelepis ciliata Fauvel, 1927 – synonym of Malacoceros tetracerus
Scolelepis foliosa Söderström, 1920 – synonym of Scolelepis foliosa
Scolelepis fuliginosa – synonym of Malacoceros fuliginosus
Scolelepis fuliginosa Fauvel, 1927 – synonym of Malacoceros fuliginosus
Scolelepis giardi – synonym of Malacoceros vulgaris
Scolelepis giardi Fauvel, 1927 – synonym of Malacoceros vulgaris
Scolelepis korsuni Sikorski, 1994 – synonym of Scolelepis korsuni
Scolelepis squamata Foster, 1971 – synonym of Scolelepis squamata
Scolelepis tridentata Hartmann-Schröder, 1971 – synonym of Scolelepis tridentata
Scoloplos armiger McIntosh, 1910 – synonym of Scoloplos armiger
Scoloplos minor – synonym of Naineris quadricuspida
Scoloplos minor Oersted, 1843 – synonym of Naineris quadricuspida
Scoloplos quadricuspida – synonym of Naineris quadricuspida
Scoloplos quadricuspida Oersted, 1843 – synonym of Naineris quadricuspida
Serpula crystallina – synonym of Placostegus tridentatus
Serpula crystallina Kupffer, 1873 – synonym of Placostegus tridentatus
Serpula granulata – synonym of Jugaria granulata
Serpula granulata Linnaeus, 1767 – synonym of Jugaria granulata
Serpula libra – synonym of Ditrupa arietina
Serpula libra M. Sars, 1835 – synonym of Ditrupa arietina
Serpula lucida – synonym of Circeis spirillum
Serpula lucida Montagu, 1803 – synonym of Circeis spirillum
Serpula spirillum – synonym of Circeis spirillum
Serpula spirillum Linnaeus, 1758 – synonym of Circeis spirillum
Serpula spirorbis – synonym of Spirorbis spirorbis
Serpula spirorbis Linnaeus, 1758 – synonym of Spirorbis spirorbis
Serpula tridentatus – synonym of Placostegus tridentatus
Serpula tridentatus Fabricius, 1779 in Mörch, 1863 – synonym of Placostegus tridentatus
Serpula triquetra Linnaeus, 1758 – synonym of Pomatoceros triqueter
Serpula tubularia Montagu, 1803 – synonym of Protula tubularia
Serpula vermicularis Linnaeus, 1767 – synonym of Serpula vermicularis
Serpula vitrea – synonym of Paradexiospira vitrea
Serpula vitrea Fabricius, 1780 – synonym of Paradexiospira vitrea
Sigalion boa – synonym of Sthenelais boa
Sigalion boa Johnston, 1833 – synonym of Sthenelais boa
Sigalion carringtonii – synonym of Sthenelais boa
Sigalion carringtonii Carrington, 1865 – synonym of Sthenelais boa
Sigalion limicola – synonym of Sthenelais limicola
Sigalion limicola Ehlers, 1864 – synonym of Sthenelais limicola
Sigalion mathildae Audouin & Milne-Edwards (in Cuvier, 1830) – synonym of Sigalion mathildae
Sigalion tetragonum – synonym of Neoleanira tetragona
Sigalion tetragonum Oersted, 1845 – synonym of Neoleanira tetragona
Sige fusigera Malmgren, 1865 – synonym of Sige fusigera
Sige macrocero – synonym of Sige fusigera
Sige macroceros Bergström, 1914 – synonym of Sige fusigera
Sige oliveri Pleijel, 1990 – synonym of Sige oliveri
Siphonostoma inhabilis – synonym of Brada inhabilis
Siphonostoma inhabilis Rathke, 1843 – synonym of Brada inhabilis
Siphonostoma plumosa – synonym of Pherusa plumosa
Siphonostoma plumosa Rathke, 1843 – synonym of Pherusa plumosa
Siphonostoma vaginiferum – synonym of Flabelligera affinis
Siphonostoma vaginiferum Rathke, 1843 – synonym of Flabelligera affinis
Siphonostoma villosum – synonym of Brada villosa
Siphonostoma villosum Rathke, 1843 – synonym of Brada villosa
Skardaria fragmentata – synonym of Apistobranchus tullbergi
Skardaria fragmentata McIntyre, 1961 – synonym of Apistobranchus tullbergi
Sosane gracilis – synonym of Anobothrus gracilis
Sosane gracilis Auctt. – synonym of Anobothrus gracilis
Sosane sulcata Malmgren, 1866 – synonym of Sosane sulcata
Sosane sulcata nidrosiensis – synonym of Anobothrus gracilis
Sosane sulcata nidrosiensis Bidenkap, 1907 – synonym of Anobothrus gracilis
Sosanopsis wireni Hessle, 1917 – synonym of Sosanopsis wireni
Sphaerodoridium balticum – synonym of Sphaerodoropsis baltica
Sphaerodoridium balticum Hartmann-Schröder, 1971 – synonym of Sphaerodoropsis baltica
Sphaerodoridium commensalis – synonym of Commensodorum commensalis
Sphaerodoridium commensalis Lützen, 1961 – synonym of Commensodorum commensalis
Sphaerodoridium distichum – synonym of Sphaerodoropsis disticha
Sphaerodoridium distichum Hartmann-Schröder, 1971 – synonym of Sphaerodoropsis disticha
Sphaerodoridium fauchaldi Hartmann-Schröder, 1993 – synonym of Sphaerodoridium fauchaldi
Sphaerodoridium minutum – synonym of Sphaerodoropsis minuta
Sphaerodoridium minutum Hartmann-Schröder, 1971 – synonym of Sphaerodoropsis minuta
Sphaerodoridium philippi – synonym of Sphaerodoropsis philippi
Sphaerodoridium philippi Hartmann-Schröder, 1971 – synonym of Sphaerodoropsis philippi
Sphaerodoropsis balticum – synonym of Sphaerodoropsis baltica
Sphaerodoropsis balticum Kirkegaard, 1992 – synonym of Sphaerodoropsis baltica
Sphaerodoropsis distichum – synonym of Sphaerodoropsis disticha
Sphaerodoropsis distichum Kirkegaard, 1992 – synonym of Sphaerodoropsis disticha
Sphaerodoropsis minuta Fauchald, 1974 – synonym of Sphaerodoropsis minuta
Sphaerodoropsis philippi Kirkegaard, 1992 – synonym of Sphaerodoropsis philippi
Sphaerodorum balticum – synonym of Sphaerodoropsis baltica
Sphaerodorum balticum Reimers, 1933 – synonym of Sphaerodoropsis baltica
Sphaerodorum distichum – synonym of Sphaerodoropsis disticha
Sphaerodorum distichum Eliason, 1962 – synonym of Sphaerodoropsis disticha
Sphaerodorum flavum Oersted, 1843 – synonym of Sphaerodorum flavum
Sphaerodorum minutum – synonym of Sphaerodoropsis minuta
Sphaerodorum minutum Fauvel, 1923 – synonym of Sphaerodoropsis minuta
Sphaerodorum peripatus – synonym of Ephesiella peripatus
Sphaerodorum peripatus Claparède, 1863 – synonym of Ephesiella peripatus
Sphaerodorum philippi – synonym of Sphaerodoropsis philippi
Sphaerodorum philippi Fauvel, 1911 – synonym of Sphaerodoropsis philippi
Sphaerosyllis bulbosa Southern, 1914 – synonym of Sphaerosyllis bulbosa
Sphaerosyllis erinaceus Claparède, 1863 – synonym of Sphaerosyllis erinaceus
Sphaerosyllis hystrix Claparède, 1863 – synonym of Sphaerosyllis hystrix
Sphaerosyllis tetralix Eliason, 1920 – synonym of Sphaerosyllis tetralix
Spinther arcticus Hartmann-Schröder, 1971 – synonym of Spinther arcticus
Spinther miniaceus – synonym of Spinther arcticus
Spinther miniaceus Grube, 1860 – synonym of Spinther arcticus
Spio bombyx – synonym of Spiophanes bombyx
Spio bombyx Claparède, 1870 – synonym of Spiophanes bombyx
Spio cirrata – synonym of Laonice cirrata
Spio cirrata Michaelsen, 1896 – synonym of Laonice cirrata
Spio filicornis – synonym of Spio goniocephala
Spio filicornis Eliason, 1920 part – synonym of Spio goniocephala
Spio filicornis Söderström, 1920 – synonym of Spio filicornis
Spio foliosa – synonym of Scolelepis foliosa
Spio foliosa Levinsen, 1883 – synonym of Scolelepis foliosa
Spio fuliginosus – synonym of Malacoceros fuliginosus
Spio fuliginosus Claparède, 1868 – synonym of Malacoceros fuliginosus
Spio goniocephala Thulin, 1957 – synonym of Spio goniocephala
Spio martinensis Mesnil, 1896 – synonym of Spio martinensis
Spio mecznikowianus – synonym of Microspio mecznikowianus
Spio mecznikowianus Claparède, 1868 – synonym of Microspio mecznikowianus
Spio oxycephala – synonym of Aonides oxycephala
Spio oxycephala Levinsen, 1883 – synonym of Aonides oxycephala
Spio seticornis – synonym of Pygospio elegans
Spio seticornis Michaelsen, 1896 – synonym of Pygospio elegans
Spio vulgaris – synonym of Malacoceros vulgaris
Spio vulgaris Johnston, 1827 – synonym of Malacoceros vulgaris
Spiochaetopterus typicus M. Sars, 1856 – synonym of Spiochaetopterus typicus
Spiophanes bombyx Söderström, 1920 – synonym of Spiophanes bombyx
Spiophanes kroeyeri Grube, 1860 – synonym of Spiophanes kroeyeri
Spiophanes urceolata Imajima, 1991 – synonym of Spiophanes urceolata
Spirorbis bellulus Bush – synonym of Janua brasiliensis
Spirorbis bellulus Bush (in Moore & Bush, 1904) – synonym of Janua brasiliensis
Spirorbis borealis – synonym of Spirorbis spirorbis
Spirorbis borealis Daudin, 1800 – synonym of Spirorbis spirorbis
Spirorbis brasiliensis – synonym of Janua brasiliensis
Spirorbis brasiliensis Grube, 1872 – synonym of Janua brasiliensis
Spirorbis carinatus – synonym of Jugaria granulata
Spirorbis carinatus Levinsen, 1883 – synonym of Jugaria granulata
Spirorbis corallinae De Silva & Knight-Jones, 1962 – synonym of Spirorbis corallinae
Spirorbis foraminosus – synonym of Janua brasiliensis
Spirorbis foraminosus sensu Day, 1961 – synonym of Janua brasiliensis
Spirorbis granulata – synonym of Jugaria granulata
Spirorbis granulata Borg, 1917 – synonym of Jugaria granulata
Spirorbis granulatus – synonym of Jugaria granulata
Spirorbis granulatus Fauvel, 1927 part – synonym of Jugaria granulata
Spirorbis linnei – synonym of Spirorbis spirorbis
Spirorbis linnei Malm, 1874 – synonym of Spirorbis spirorbis
Spirorbis nautiloides – synonym of Spirorbis spirorbis
Spirorbis nautiloides Moebius, 1873 – synonym of Spirorbis spirorbis
Spirorbis pagenstecheri – synonym of Janua pagenstecheri
Spirorbis pagenstecheri Quatrefages, 1866 – synonym of Janua pagenstecheri
Spirorbis pusilloides – synonym of Janua pagenstecheri
Spirorbis pusilloides Bush, 1904 – synonym of Janua pagenstecheri
Spirorbis spirillum – synonym of Circeis spirillum
Spirorbis spirillum Auctt. – synonym of Circeis spirillum
Spirorbis spirorbis Hartmann-Schröder, 1971 – synonym of Spirorbis spirorbis
Spirorbis tridentatus Levinsen, 1883 – synonym of Spirorbis tridentatus
Spirorbis vitreus – synonym of Paradexiospira vitrea
Spirorbis vitreus Borg, 1917 – synonym of Paradexiospira vitrea
Staurocephalus erucaeformis – synonym of Dorvillea erucaeformis
Staurocephalus erucaeformis Malmgren, 1865 – synonym of Dorvillea erucaeformis
Staurocephalus kefersteini – synonym of Protodorvillea kefersteini
Staurocephalus kefersteini McIntosh, 1869 – synonym of Protodorvillea kefersteini
Staurocephalus siberti – synonym of Ophryotrocha puerilis
Staurocephalus siberti McIntosh, 1885 – synonym of Ophryotrocha puerilis
Stauronereis caecus – synonym of Parougia eliasoni
Stauronereis caecus Hartmann-Schröder, 1971 part – synonym of Parougia eliasoni
Stauronereis furcat – synonym of Parougia eliasoni
Stauronereis furcata Eliason, 1962 part – synonym of Parougia eliasoni
Stenelais atlantica – synonym of Sthenelais zetlandica
Stenelais atlantica McIntosh, 1876 – synonym of Sthenelais zetlandica
Stenelais minor? Saint-Joseph, 1899 – synonym of Sthenelais boa
Stenelais zetlandica McIntosh, 1876 – synonym of Sthenelais zetlandica
Sternaspis scutata Fauvel, 1927 – synonym of Sternaspis scutata
Sthenelais boa McIntosh, 1900 – synonym of Sthenelais boa
Sthenelais edwardsii – synonym of Sthenelais boa
Sthenelais edwardsii Quatrefages, 1865 – synonym of Sthenelais boa
Sthenelais idunae – synonym of Sthenelais boa
Sthenelais idunae Michaelsen, 1896 – synonym of Sthenelais boa
Sthenelais jeffreysii McIntosh, 1876 – synonym of Sthenelais jeffreysii
Sthenelais limicola McIntosh, 1900 – synonym of Sthenelais limicola
Streblosoma bairdi Hessle, 1917 – synonym of Streblosoma bairdi
Streblosoma cochleatum – synonym of Streblosoma bairdi
Streblosoma cochleatum Sars, 1872 – synonym of Streblosoma bairdi
Streblosoma intestinale Sars, 1872 – synonym of Streblosoma intestinale
Streblospio benedicti Webster, 1879 – synonym of Streblospio benedicti
Streblospio dekhuyzeni – synonym of Streblospio benedicti
Streblospio dekhuyzeni Horst, 1909 – synonym of Streblospio benedicti
Streblospio shrubsolii – synonym of Streblospio benedicti
Streblospio shrubsolii Fauvel, 1927 – synonym of Streblospio benedicti
Streptosyllis arenae Webster & Benedict, 1884 – synonym of Streptosyllis arenae
Streptosyllis websteri Southern, 1914 – synonym of Streptosyllis websteri
Stygocapitella subterranea Knöllner, 1934 – synonym of Stygocapitella subterranea
Stylarioides flabellata – synonym of Pherusa flabellata
Stylarioides flabellata Haase, 1915 – synonym of Pherusa flabellata
Stylarioides glaucus – synonym of Diplocirrus glaucus
Stylarioides glaucus Michaelsen, 1896 – synonym of Diplocirrus glaucus
Stylarioides plumosa – synonym of Pherusa plumosa
Stylarioides plumosa Haase, 1915 – synonym of Pherusa plumosa
Subadyte pellucida – synonym of Adyte pellucida
Subadyte pellucida Pettibone, 1969 – synonym of Adyte pellucida
Syllides articulocirrata Gillandt, 1979 – synonym of Syllides articulocirrata
Syllides benedicti Banse, 1971 – synonym of Syllides benedicti
Syllides longocirrata Eliason, 1962 – synonym of Syllides longocirrata
Syllidia armata Quatrefages, 1865 – synonym of Syllidia armata
Sylline rubropunctata – synonym of Autolytus rubropunctatus
Sylline rubropunctata Grube, 1860 – synonym of Autolytus rubropunctatus
Syllis armillaris – synonym of Typosyllis armillaris
Syllis armillaris McIntosh, 1908 – synonym of Typosyllis armillaris
Syllis borealis – synonym of Typosyllis hyalina
Syllis borealis Malm, 1874 – synonym of Typosyllis hyalina
Syllis cornuta – synonym of Typosyllis cornuta
Syllis cornuta Rathke, 1843 – synonym of Typosyllis cornuta
Syllis fulgurans – synonym of Odontosyllis fulgurans
Syllis fulgurans Audouin & Milne-Edwards, 1834 – synonym of Odontosyllis fulgurans
Syllis gracilis Grube, 1840 – synonym of Syllis gracilis
Syllis hyalina – synonym of Typosyllis hyalina
Syllis hyalina Grube, 1863 – synonym of Typosyllis hyalina
Syllis longocirrata – synonym of Syllides longocirrata
Syllis longocirrata Oersted, 1845 – synonym of Syllides longocirrata
Syllis pellucida – synonym of Typosyllis hyalina
Syllis pellucida Ehlers, 1864 – synonym of Typosyllis hyalina
Syllis pulligera – synonym of Pionosyllis pulligera
Syllis pulligera Krohn, 1852 – synonym of Pionosyllis pulligera
Syllis variegata – synonym of Typosyllis variegata
Syllis variegata Grube, 1860 – synonym of Typosyllis variegata