Nectoneanthes oxypoda (Marenzeller, 1879) and
N. alatopalpis (Wesenberg-Lund, 1949) are synonymized with
Neanthes succinea Leuckart, 1847.
Nectoneanthes Imajima, 1972, with type species
Nereis (Alitta) oxypoda Marenzeller, thus becomes a junior synonym of
Neanthes Kinberg, 1866. An undescribed species of
Neanthes is recognized.
Nectoneanthes ijimai (Izuka, 1912) is once more referred to
Neanthes, and
Nectoneanthes latipoda Paik, 1973 and
N. multignatha Wu, Sun & Yang, 1981 are referred to
Neanthes for the first time.