Echiuridae Quatrefages, 1847
Arhynchite arhynchite (Ikeda, 1924)
Arhynchite californicus Fisher, W.K., 1949
Arhynchite hiscocki Edmonds, S.J, 1960
Arhynchite inamoenus Fisher, W.K., 1946
Arhynchite paulensis Amor, A., 1971
Arhynchite pugettensis Fisher, W.K., 1949
Arhynchite rugosus Chen, Y. & C.C. Yeh, 1958
