Amaea Malmgren, 1866, non Adams, 1853 – synonym of Amaeana, Genus
Amaea, Genus – synonym of Amaeana, Genus
Ampharetides Ehlers, 1913 – synonym of Terebellides, Genus
Ampharetides, Genus – synonym of Terebellides, Genus
Amphictene Savigny, 1818 – synonym of Pectinaria, Genus
Amphictene, Genus – synonym of Pectinaria, Genus
Amphictenidae Grube, 1851, Familia – synonym of Pectinariidae, Familia
Amphictenidae, Family, Familia – synonym of Pectinariidae, Familia
Amphiro Montagu, 1808 – synonym of Amphitrite, Genus
Amphiro, Genus – synonym of Amphitrite, Genus
Amphitritoides Costa, 1862 – synonym of Eupolymnia, Genus
Amphitritoides, Genus – synonym of Eupolymnia, Genus
Anaitides Czerniavsky, 1882 – synonym of Phyllodoce, Genus
Anaitides, Genus – synonym of Phyllodoce, Genus
Anaitis Malmgren, 1865 – synonym of Paranaitis, Genus
Anaitis, Genus – synonym of Paranaitis, Genus
Anisocirrus Gravier, 1905 – synonym of Polycirrus, Genus
Anisocirrus, Genus – synonym of Polycirrus, Genus
Antinoana Hartman & Fauchald, 1971 – synonym of Bylgides, Genus
Antinoana, Genus – synonym of Bylgides, Genus
Antinoe sensu Malmgren, 1865 (non Kinberg, 1856) – synonym of Bylgides, Genus
Antinoe, Genus – synonym of Bylgides, Genus
Antinoella Augener, 1928 – synonym of Bylgides, Genus
Antinoella, Genus – synonym of Bylgides, Genus
Aphlebin, Genus – synonym of Polycirrus, Genus
Aphlebine Quatrefages, 1844 – synonym of Polycirrus, Genus
Apneumea Quatrefages, 1850 – synonym of Polycirrus, Genus
Apneumea, Genus – synonym of Polycirrus, Genus
Aponobranchus Gravier, 1905 – synonym of Terebellides, Genus
Aponobranchus, Genus – synonym of Terebellides, Genus
Arabellidae, Family, Familia – synonym of Oenonidae, Familia