| Nominal Species (n = 206) | Present allocation (n = 196) | Ref. |
|---|---|---|
| Xandaros acanthodes Maciolek, 1981 | Xandaros acanthodes | 8159 |
| Rhynchospio aciliata Lee & Min, 2022 | Rhynchospio aciliata | 3477 |
| Spio aequalis Ehlers, 1904 | Spio aequalis | 3477 |
| Spiophanes afer Meissner, 2005 | Spiophanes afer | 85340 |
| Prionospio africana Augener, 1918 | Paraprionospio pinnata | 3477 |
| Polydora agassizii Claparède, 1869 | Polydora ciliata | 3477 |
| Polydora aggregata Blake, 1969 | Polydora aggregata | 7866 |
| Laonice alberti Sikorski, Langeneck & Pavlova in Sikorski et al., 2021 | Laonice alberti | 3477 |
| Aciculaspio anaximanderi Blake & Ramey-Balci, 2020 | Aciculaspio anaximanderi | 3477 |
| Spiophanes anoculata Hartman, 1960 | Spiophanes anoculata | 8159 |
| Polydora anophthalma Rioja, 1963 | Polydora anophthalma | 8159 |
| Polydora antennata Claparede, 1870 | Pseudopolydora antennata | 75097 |
| Prionospio anuncata Fauchald, 1972 | Prionospio anuncata | 8159 |
| Nerinides arenicola Hartmann-Schröder, 1959 | Nerinides arenicola | 8159 |
| Microspio ariena Maciolek & Blake, 2021 | Microspio ariena | 3477 |
| Polydora armata Langerhans, 1880 | Dipolydora armata | 19 |
| Laonice athecata Sigvaldadottir & Desbruyeres, 2003 | Laonice athecata | 8774 |
| Prionospio aucklandica Augener, 1923 | Prionospio aucklandica | 3477 |
| Pseudopolydora auha Radashevsky, Al-Kandari, Malyar & Pankova, 2021 | Pseudopolydora auha | 3477 |
| Laonice bahusiensis Soderstrom, 1920 | Laonice bahusiensis | 19 |
| Prionospio banyulensis Laubier, 1868 | Prionospio banyulensis | 19 |
| Polydora barbilla Blake, 1981 | Polydora barbilla | 8159 |
| Laonice barcinensis Sikorski in Sikorski et al., 2021 | Laonice barcinensis | 3477 |
| Pseudopolydora bassarginensis (Zachs, 1933) | Pseudopolydora bassarginensis | 3477 |
| Laonice bassensis Blake & Kudenov, 1978 | Laonice bassensis | 8159 |
| Streblospio benedicti Webster, 1879 | Streblospio benedicti | 19 |
| Spiophanes berkeleyorum Pettibone, 1962 | Spiophanes berkeleyorum | 19 |
| Laonice blakei Sikorsky & Jirkov, 1988 | Laonice blakei | 3477 |
| Prionospio bocki Söderström, 1920 | Prionospio bocki | 8159 |
| Anaspio boreus Chamberlin, 1920 | Anaspio boreus | 3477 |
| Polydora brachycephala Hartman, 1936 | Dipolydora caulleryi | 3477 |
| Aonides californiensis Rioja, 1947 | Aonides californiensis | 8159 |
| Prionospio capensis McIntosh, 1885 | Prionospio malmgreni | 3477 |
| Polydora cardalia Berkeley, 1927 | Polydora cardalia | 19 |
| Prionospio caspersi Laubier, 1962 | Prionospio caspersi | 19 |
| Polydora caulleryi Mesnil, 1897 | Dipolydora caulleryi | 7866 |
| Polydora cavitensis Pillai, 1965 | Polydora cavitensis | 3477 |
| Nerine cirrata Sars, 1850 | Laonice cirrata | 75097 |
| Scolecolepis cirrata Webster & Benedict, 1884 | Laonice cirrata | 3477 |
| Prionospio cirrifera Wirén, 1883 | Prionospio cirrifera | 2778 |
| Prionospio cirrobranchiata Day, 1961 | Aonidella cirrobranchiata | 7866 |
| Polydora cirrosa Rioja, 1943 | Polydora cirrosa | 8159 |
| Polydora citrona Hartman, 1941 | Carazziella citrona | 75097 |
| Polydora colonia Moore, 1907 | Polydora colonia | 7866 |
| Boccardia columbiana Berkeley, 1927 | Boccardia columbiana | 3477 |
| Polydora commensalis Andrews, 1891 | Polydora commensalis | 7866 |
| Polydora convexa Blake & Woodwick, 1972 | Polydora convexa | 8159 |
| Pseudopolydora corallicola Woodwick, 1964 | Pseudopolydora corallicola | 19 |
| Polydora cornuta Bosc, 1802 | Polydora cornuta | 19 |
| Prionospio cristata Foster, 1971 | Prionospio cristata | 7866 |
| Aonidella dayi Maciolek, 1983 | Aonidella dayi | 8159 |
| Spio decoratus Bobretzky, 1870 | Spio decoratus | 3477 |
| Streblospio dekhuyzeni Horst, 1909 | Streblospio dekhuyzeni | 19 |
| Prionospio delta Hartman, 1965 | Minuspio delta | 7866 |
| Prionospio depauperata Imajima, 1990 | Prionospio depauperata | 3477 |
| Aurospio dibranchiata Maciolek, 1981 | Aurospio dibranchiata | 7866 |
| Lindaspio dibranchiata Blake & Maciolek, 1992 | Lindaspio dibranchiata | 8159 |
| Pseudopolydora diopatra Hsieh, 1992 | Pseudopolydora diopatra | 3477 |
| Prionospio dubia Day, 1961 | Prionospio dubia | 3477 |
| Dipolydora echinata Radashevsky, 2022 | Dipolydora echinata | 3477 |
| Prionospio ehlersi Fauvel, 1928 | Prionospio ehlersi | 19 |
| Pygospio elegans Claparède, 1863 | Pygospio elegans | 7866 |
| Prionospio fallax Söderström, 1920 | Prionospio fallax | 7866 |
| Prionospio fauchaldi Maciolek, 1985 | Prionospio fauchaldi | 7866 |
| Nereis filicornis Müller, 1776 | Spio filicornis | 75097 |
| Spiophanes fimbriata Moore, 1923 | Spiophanes fimbriata | 8159 |
| Microspio fischeri Maciolek & Blake, 2021 | Microspio fischeri | 3477 |
| Polydora flava Claparede, 1870 | Dipolydora flava | 19 |
| Aurospio foodbancsia Mincks, Dyal, Paterson, Smith & Glover, 2009 | Aurospio foodbancsia | 88769 |
| Boccardia galapagense Blake, 1986 | Boccardia galapagense | 8159 |
| Polydora giardi Mesnil, 1896 | Dipolydora giardi | 19 |
| Scolelepis gilchristi de Blainville, 1828 | Scolelepis korsuni | 3477 |
| Malacoceros girardi Quatrefages, 1843 | Malacoceros girardi | 3477 |
| Dispio glabrilamellata Blake & Kudenov, 1978 | Dispio glabrilamellata | 8159 |
| Dispio glandulosa Delgado-Blas, Díaz-Díaz & Viéitez, 2019 | Dispio glandulosa | 3477 |
| Rhynchospio glandulosa Radashevsky & Choi, 2021 | Rhynchospio glandulosa | 3477 |
| Polydora glycymerica Radashevsky, 1993 | Polydora glycymerica | 3477 |
| Spio goniocephala Thulin, 1957 | Spio goniocephala | 19 |
| Laubieriellus grasslei Maciolek, 1981 | Laubieriellus grasslei | 8159 |
| Laonice grimaldii Sikorski, Nygren & Mikac, in Sikorski et al,. 2021 | Laonice grimaldii | 3477 |
| Streblospio gynobranchiata Rice & Levin, 1998 | Streblospio gynobranchiata | 3477 |
| Boccardia hamata Webster, 1879 | Boccardiella hamata | 19 |
| Polydora hamata Webster, 1879 | Boccardiella hamata | 1046 |
| Polydora hermaphroditica Hannerz, 1956 | Polydora hermaphroditica | 19 |
| Prionospio heterobranchia Moore, 1907 | Prionospio heterobranchia | 7866 |
| Polydora heterochaeta Rioja, 1939 | Polydora heterochaeta | 8159 |
| Spio hirsuta Treadwell, 1928 | Spio hirsuta | 8159 |
| Carazziella hobsonae Blake, 1979 | Carazziella hobsonae | 7866 |
| Polydora hoplura Claparede, 1870 | Polydora hoplura | 19 |
| Scolelepis indica Fauvel, 1928 | Malacoceros indicus | 84263 |
| Laonice irinae Sikorski, Radashevsky & Nygren in Sikorski et al., 2021 | Laonice irinae | 3477 |
| Prionospio japonicus Okuda, 1935 | Minuspio japonica | 3477 |
| Marenzelleria jonesi Maciolek, 1984 | Marenzelleria jonesi | 7866 |
| Polydora kaneohe Ward, 1981 | Polydora kaneohe | 19 |
| Pseudopolydora kempi japonica Imajima & Hartman, 1964 | Pseudopolydora kempi | 3477 |
| Prionospio komaeti Hylleberg & Nateewathana, 1991 | Prionospio komaeti | 3477 |
| Scolelepis korsuni Sikorski, 1994 | Scolelepis korsuni | 3477 |
| Spiophanes kroeyeri Grube, 1860 | Spiophanes kroeyeri | 19 |
| Spiophanes kroyeri Grube, 1860 | Spiophanes kroyeri | 7866 |
| Pseudopolydora kuwaiti Radashevsky, Al-Kandari, Malyar & Pankova, 2021 | Pseudopolydora kuwaiti | 3477 |
| Paraprionospio lamellibranchia Hartman, 1974 | Paraprionospio lamellibranchia | 2663 |
| Polydora langerhansi Mesnil, 1896 | Dipolydora langerhansi | 87289 |
| Polydora laticephala Hartmann-Schröder, 1959 | Polydora laticephala | 8159 |
| Glyphochaeta laudieni Bick, 2005 | Glyphochaeta laudieni | 3477 |
| Nerine lefebvrei Gravier, 1905 | Scolelepis lefebvrei | 2663 |
| Boccardia ligerica Ferronnière, 1898 | Boccardiella ligerica | 19 |
| Prionospio lighti Maciolek, 1985 | Prionospio lighti | 19 |
| Polydora ligni Webster, 1879 | Polydora cornuta | 7866 |
| Spiophanes lowai Solís-Weiss, 1983 | Spiophanes lowai | 8159 |
| Microspio lydonia Maciolek & Blake, 2021 | Microspio lydonia | 3477 |
| Nerinides maculata Hartman, 1961 | Nerinides maculata | 8159 |
| Polydora magellanica Blake, 1983 | Dipolydora magellanica | 3477 |
| Spiophanes malayensis Caullery, 1915 | Spiophanes malayensis | 3477 |
| Prionospio malmgreni Claparede, 1869 | Prionospio malmgreni | 19 |
| Spio martinensis Mesnil, 1896 | Spio martinensis | 19 |
| Aonides mayaguezensis Foster, 1969 | Aonides mayaguezensis | 7866 |
| Microspio mecznikowianus Claparede, 1870 | Microspio mecznikowianus | 19 |
| Laonice mediterranea Sikorski, Nygren & Rousou, in Sikorski et. al., 2021 | Laonice mediterranea | 3477 |
| Spiophanes mediterraneus Meissner, 2005 | Spiophanes mediterraneus | 85340 |
| Pseudopolydora melanopalpa Radashevsky, Al-Kandari, Malyar & Pankova, 2021 | Pseudopolydora melanopalpa | 3477 |
| Prionospio membranacea Imajima, 1990 | Prionospio membranacea | 3477 |
| Spiophanes missionensis Hartman, 1941 | Spiophanes duplex | 3477 |
| Australospio mokapu Ward, 1981 | Australospio mokapu | 19 |
| Mesospio moorei Gravier, 1911 | Mesospio moorei | 19 |
| Prionospio multibranchiata Berkeley, 1927 | Prionospio multibranchiata | 7866 |
| Pseudopolydora multispinosa Radashevsky, Al-Kandari, Malyar & Pankova, 2021 | Pseudopolydora multispinosa | 3477 |
| Marenzelleria neglecta Sikorski & Bick, 2004 | Marenzelleria neglecta | 3477 |
| Aonides nodosetosa Storch, 1967 | Aonides nodosetosa | 2663 |
| Pseudopolydora nordica Radashevsky, 2021 | Pseudopolydora nordica | 3477 |
| Polydorella novaegeorgiae Gibbs, 1971 | Polydorella novaegeorgiae | 3477 |
| Polydora nuchalis Woodwick, 1953 | Polydora nuchalis | 8159 |
| Prionospio ornata Berkeley & Berkeley, 1961 | Prionospio ornata | 8159 |
| Polydora pacifica Takahashi, 1937 | Polydora pacifica | 3477 |
| Spiophanes pallidus Hartman, 1960 | Spiophanes pallidus | 19 |
| Prionospio paradisea Imajima, 1990 | Prionospio paradisea | 3477 |
| Microspio paradoxa Blake, 1983 | Microspio paradoxa | 8159 |
| Prionospio patagonica Augener, 1923 | Prionospio patagonica | 3477 |
| Aonides paucibranchiata Southern, 1914 | Aonides paucibranchiata | 19 |
| Polydora paucibranchis Ehlers, 1913 | Polydora paucibranchis | 88727 |
| Polydora perala Khlebovich, 1959 | Boccardia perala | 1046 |
| Polydora peristomialis Hartman, 1974 | Polydora peristomialis | 2663 |
| Prionospio perkinsi Maciolek, 1985 | Prionospio perkinsi | 7866 |
| Prionospio peruana Hartmann-Schröder, 1962 | Prionospio peruana | 3477 |
| Spio pettibonae Foster, 1971 | Spio pettibonae | 7866 |
| Spio pettiboneae Foster, 1971 | Spio pettiboneae | 19 |
| Spio pigmentata Lee, Meißner, Yoon & Min, 2021 | Spio pigmentata | 3477 |
| Polydora pilikia Ward, 1981 | Polydora pilikia | 19 |
| Prionospio pinnata Ehlers, 1901 | Paraprionospio pinnata | 3477 |
| Polydora polybranchia Haswell, 1885 | Boccardia polybranchia | 8159 |
| Prionospio polybranchiata Fauvel, 1929 | Prionospio polybranchiata | 3477 |
| Polydora posthamata Jones, 1962 | Polydora posthamata | 19 |
| Boccardia proboscidea Hartman, 1940 | Boccardia proboscidea | 19 |
| Polydorella prolifera Augener, 1914 | Pseudopolydora prolifera | 19 |
| Prionospio pulchra Imajima, 1990 | Prionospio pulchra | 3477 |
| Polydora punctata Hartmann-Schröder, 1959 | Polydora punctata | 8159 |
| Polydora quadrilobata Jacobi, 1883 | Dipolydora quadrilobata | 19 |
| Metadasydytes quadrimaculatus Roszczak, 1971 | Polydora ciliata | 92317 |
| Prionospio queenslandica Blake & Kudenove, 1978 | Prionospio queenslandica | 75927 |
| Polydora redeki Horst, 1920 | Boccardia redeki | 75097 |
| Pseudopolydora reishi Woodwick, 1964 | Pseudopolydora reishi | 8159 |
| Spiophanes reyssi Laubier, 1964 | Spiophanes reyssi | 3477 |
| Polydora rickettesi Woodwick, 1961 | Polydora rickettesi | 8159 |
| Prionospio rotalis Mohammad, 1970 | Prionospio rotalis | 2663 |
| Prionospio rugosa Sigvaldadóttir, 1997 | Prionospio rugosa | 3477 |
| Prionospio saccifera Mackie & Hartley, 1990 | Prionospio saccifera | 2663 |
| Dipolydora saintjosephi Eliason, 1920 | Dipolydora saintjosephi | 3477 |
| Prionospio saldanha Day, 1961 | Prionospio saldanha | 3477 |
| Prionospio sandersi Maciolek, 1981 | Prionospio sandersi | 8159 |
| Laonice sarsi Soderstrom, 1920 | Laonice sarsi | 19 |
| Boccardia semibranchiata Guerin, 1990 | Boccardia semibranchiata | 3477 |
| Spio setosa Verrill | Spio setosa | 19 |
| Prionospio sexoculata Augener, 1918 | Prionospio sexoculata | 2663 |
| Prionospio sishaensis Wu & Chen, 1964 | Prionospio sishaensis | 3477 |
| Polydorella smurovi Tzetlin & Brtiayev, 1985 | Pseudopolydora smurovi | 2663 |
| Spiophanes soderstromi Hartman, 1953 | Spiophanes duplex | 3477 |
| Lindaspio southwardorum Blake & Maciolek, 1992 | Lindaspio southwardorum | 8774 |
| Dipolydora spinosa Radashevsky, 2022 | Dipolydora spinosa | 3477 |
| Tripolydora spinosa Woodwick, 1964 | Tripolydora spinosa | 19 |
| Polydora spondylana Mohammad, 1973 | Polydora spondylana | 2663 |
| Polydora spongicola Berkeley & Berkeley, 1950 | Polydora spongicola | 8159 |
| Carazziella spongilla Blake & Kudenov, 1978 | Carazziella spongilla | 1046 |
| Scolelepis squamata Müller, 1806 | Scolelepis squamata | 7866 |
| Lumbricus squamatus Müller, 1806 | Scolelepis squamata | 75097 |
| Prionospio steenstrupi Malmgren, 1867 | Prionospio steenstrupi | 19 |
| Spiophanes tcherniai Fauvel, 1950 | Spiophanes tcherniai | 3477 |
| Polydora tentaculata Blake & Kudenov, 1978 | Polydora tentaculata | 19 |
| Scolelepis texana Foster, 1971 | Scolelepis texana | 7866 |
| Microspio theeli Söderström, 1920 | Spio theeli | 3477 |
| Polydora tricuspa Hartman, 1939 | Boccardia tricuspa | 8159 |
| Polydora tridenticulata Woodwick, 1964 | Polydora tridenticulata | 19 |
| Prionospio tripinnata Maciolek, 1985 | Prionospio tripinnata | 3477 |
| Polydora tunicola Abe, Hoshino & Yamada in Abe et al., 2022 | Polydora tunicola | 3477 |
| Polydora uncata Berkeley & Berkeley, 1952 | Polydora uncata | 8159 |
| Dispio uncinata Hartman, 1951 | Dispio uncinata | 19 |
| Phonospio unilamellata Sigvaldadottir & Desbruyeres, 2003 | Phonospio unilamellata | 8774 |
| Scolecolepis vanderhorsti Augener, 1927 | Malacoceros vanderhorsti | 75097 |
| Dipolydora vietnamita Radashevsky, 2022 | Dipolydora vietnamita | 3477 |
| Scolelepides viridis Verrill, 1873 | Marenzelleria viridis | 75097 |
| Polydora vulgaris Mohammad, 1972 | Polydora vulgaris | 2663 |
| Spio vulgaris Johnston, 1827 | Malacoceros fuliginosus | 75097 |
| Polydora websteri Hartman, 1943 | Polydora websteri | 19 |
| Laonice weddellia Hartman, 1978 | Laonice weddellia | 3477 |
| Spiophanes wigleyi Pettibone, 1962 | Spiophanes wigleyi | 19 |
| Marenzelleria wireni Augener, 1913 | Marenzelleria wireni | 3477 |
| Prionospio wireni Maciolek, 1985 | Prionospio wireni | 7866 |
| Polydora wobberi Light, 1970 | Polydora wobberi | 8159 |