• Aonidella cirrobranchiata (Day, 1961)
• Aonides mayaguezensis Foster, 1969
• Apistobranchus tullbergi (Théel, 1879)
• Apistobranchus typicus (Webster & Benedict, 1887)
• Apoprionospio dayi Foster, 1969
• Dipolydora cardalia (Berkeley, 1927)
• Dipolydora caulleryi (Mesnil, 1897)
• Dipolydora coeca (Örsted, 1843)
• Dipolydora commensalis (Andrews, 1891)
• Dipolydora concharum (Verrill, 1879)
• Dipolydora hartmanae (Blake, 1971)
• Dipolydora quadrilobata (Jacobi, 1883)
• Dipolydora socialis (Schmarda, 1861)
• Dispio uncinata Hartman, 1951
• Laonice cirrata (M. Sars, 1851)
• Marenzelleria viridis (Verrill, 1873)
• Microspio pigmentata (Reish, 1959)
• Microspio theeli Söderström, 1920 accepted as Spio theeli (Söderström, 1920)
• Minuspio cirrifera (Wirén, 1883) accepted as Prionospio cirrifera Wirén, 1883
• Minuspio cirrobranchiata (Day, 1961) accepted as Aonidella cirrobranchiata (Day, 1961)
• Paraprionospio pinnata (Ehlers, 1901)
• Polydora (Polydora) quadrilobata Jacobi, 1883 accepted as Dipolydora quadrilobata (Jacobi, 1883)
• Polydora (Polydora) socialis (Schmarda, 1861) accepted as Dipolydora socialis (Schmarda, 1861)
• Polydora aggregata Blake, 1969
• Polydora caeca (Örsted, 1843) accepted as Dipolydora coeca (Örsted, 1843)
• Polydora cardalia Berkeley, 1927 accepted as Dipolydora cardalia (Berkeley, 1927)
• Polydora caulleryi Mesnil, 1897 accepted as Dipolydora caulleryi (Mesnil, 1897)
• Polydora ciliata (Johnston, 1838)
• Polydora commensalis Andrews, 1891 accepted as Dipolydora commensalis (Andrews, 1891)
• Polydora concharum Verrill, 1879 accepted as Dipolydora concharum (Verrill, 1879)
• Polydora cornuta Bosc, 1802
• Polydora gracilis Verrill, 1879 (uncertain > taxon inquirendum)
• Polydora hartmanae Blake, 1971 accepted as Dipolydora hartmanae (Blake, 1971)
• Polydora ligni Webster, 1879 accepted as Polydora cornuta Bosc, 1802
• Polydora quadrilobata Jacobi, 1883 accepted as Dipolydora quadrilobata (Jacobi, 1883)
• Polydora socialis (Schmarda, 1861) accepted as Dipolydora socialis (Schmarda, 1861)
• Polydora websteri Hartman in Loosanoff & Engle, 1943
• Prionospio (Prionospio) steenstrupi Malmgren, 1867 accepted as Prionospio steenstrupi Malmgren, 1867
• Prionospio cirrifera Wirén, 1883
• Prionospio cirrobranchiata Day, 1961 accepted as Aonidella cirrobranchiata (Day, 1961)
• Prionospio cristata Foster, 1971
• Prionospio dayi (Foster, 1969) accepted as Apoprionospio dayi Foster, 1969
• Prionospio heterobranchia Moore, 1907
• Prionospio malmgreni Claparède, 1869 (uncertain > taxon inquirendum)
• Prionospio steenstrupi Malmgren, 1867
• Prionospio tenuis (Verrill, 1880) accepted as Prionospio steenstrupi Malmgren, 1867
• Pygospio elegans Claparède, 1863
• Scolecolepides viridis (Verrill, 1873) accepted as Marenzelleria viridis (Verrill, 1873)
• Scolelepis (Parascolelepis) bousfieldi Pettibone, 1963
• Scolelepis (Parascolelepis) tridentata (Southern, 1914)
• Scolelepis (Scolelepis) squamata (O.F. Muller, 1806)
• Scolelepis squamata (Müller, 1806) represented as Scolelepis (Scolelepis) squamata (O.F. Muller, 1806)
• Scolelepis tridentata (Southern, 1914) represented as Scolelepis (Parascolelepis) tridentata (Southern, 1914)
• Spio filicornis (Müller, 1776)
• Spio filicornis pacifica Berkeley, 1936
• Spio pettiboneae Foster, 1971
• Spio setosa Verrill, 1873
• Spio theeli (Söderström, 1920)
• Spio thulini Maciolek, 1990
• Spiophanes bombyx (Claparède, 1870)
• Spiophanes cirrata M. Sars in G.O. Sars, 1872
• Spiophanes kroeyeri Grube, 1860 accepted as Spiophanes kroyeri Grube, 1860
• Spiophanes kroyeri Grube, 1860
• Spiophanes wigleyi Pettibone, 1962
• Streblospio benedicti Webster, 1879
• Trochochaeta carica (Birula, 1897)
• Trochochaeta multisetosa (Örsted, 1844)
• Trochochaeta watsoni (Fauvel, 1916)