niger, Monacoa Poulsen [J. Y.], Sado [T.], Hahn [C.], Byrkjedal [I.], Moku [M.] & Miya [M.] 2016:5, Fig. 3 [PLoS ONE v. 11 (no. 8): e0159762; ref. 34664] North-Northeast of American Samoa (05°05'S, 170°03'W), depth 0-520 meters. Holotype (unique): CBM-ZF 14683. •Valid as Monacoa niger Poulsen, Sado, Hahn, Byrkjedal, Moku & Miya 2016. Current status: Valid as Monacoa niger Poulsen, Sado, Hahn, Byrkjedal, Moku & Miya 2016. Opisthoproctidae. Distribution: Near American Samoa. Habitat: marine.