Apoprionospio pygmaea (Hartman, 1961) (redescription)
Atherospio Mackie & Duff, 1986 (source of synonymy)
Dipolydora Verrill, 1881 (status source)
Dipolydora armata (Langerhans, 1880) (new combination reference)
Dipolydora caulleryi (Mesnil, 1897) (new combination reference)
Dipolydora coeca (Örsted, 1843) (new combination reference)
Dipolydora flava (Claparède, 1870) (new combination reference)
Dipolydora giardi (Mesnil, 1893) (new combination reference)
Dipolydora langerhansi (Mesnil, 1896) (new combination reference)
Dipolydora quadrilobata (Jacobi, 1883) (new combination reference)
Dipolydora socialis (Schmarda, 1861) (new combination reference)
Laonice cirrata (M. Sars, 1851) (redescription)
Paraprionospio pinnata (Ehlers, 1901) (redescription)
Polydora (Polydora) giardi Mesnil, 1893 accepted as Dipolydora giardi (Mesnil, 1893) (new combination reference)
Polydora armata Langerhans, 1880 accepted as Dipolydora armata (Langerhans, 1880) (source of synonymy)
Polydora caeca (Örsted, 1843) accepted as Dipolydora coeca (Örsted, 1843) (new combination reference)
Polydora caulleryi Mesnil, 1897 accepted as Dipolydora caulleryi (Mesnil, 1897) (source of synonymy)
Polydora cornuta Bosc, 1802 (redescription)
Polydora flava Claparède, 1870 accepted as Dipolydora flava (Claparède, 1870) (new combination reference)
Polydora giardi Mesnil, 1893 accepted as Dipolydora giardi (Mesnil, 1893) (new combination reference)
Polydora langerhansi Mesnil, 1896 accepted as Dipolydora langerhansi (Mesnil, 1896) (source of synonymy)
Polydora limicola Annenkova, 1934 (redescription)
Polydora quadrilobata Jacobi, 1883 accepted as Dipolydora quadrilobata (Jacobi, 1883) (new combination reference)
Polydora saintjosephi Eliason, 1920 accepted as Dipolydora saintjosephi (Eliason, 1920) (new combination reference)
Polydora socialis (Schmarda, 1861) accepted as Dipolydora socialis (Schmarda, 1861) (new combination reference)
Polydora spongicola Berkeley & Berkeley, 1950 (redescription)
Prionospio (Prionospio) dubia Day, 1961 represented as Prionospio dubia Day, 1961 (redescription)
Prionospio (Prionospio) ehlersi Fauvel, 1928 accepted as Prionospio ehlersi Fauvel, 1928 (redescription)
Prionospio (Prionospio) steenstrupi Malmgren, 1867 accepted as Prionospio steenstrupi Malmgren, 1867 (redescription)
Pygospiopsis Blake, 1983 (additional source)
Spionidae Grube, 1850 (identification resource)
Spiophanes bombyx (Claparède, 1870) (redescription)
Spiophanes duplex (Chamberlin, 1919) (new combination reference)
Spiophanes wigleyi Pettibone, 1962 (redescription)