waikiki, Oligopus Cohen [D. M.] 1964:11 [Proceedings of the United States National Museum v. 116 (no. 3494); ref. 6891] Off Waikiki reef, Oahu Island, Hawaiian Islands. Holotype (unique): USNM 179898. Replacement name for Microbrotula nigra Gosline 1953, secondarily preoccupied by Oligopus niger Risso when both are in Oligopus. •Valid as Oligopus waikiki Cohen 1964 -- (Cohen & Nielsen 1978:49 [ref. 881]). •Valid as Grammonus waikiki (Cohen 1964) -- (Nielsen & Cohen in Nielsen et al. 1999:104 [ref. 24448], Nielsen & Cohen 2004:85 [ref. 28073], Mundy 2005:247 [ref. 28379], Nielsen 2007:375 [ref. 29358], Randall 2007:119 [ref. 30952], Randall & Hughes 2008:137 [ref. 29910], Nielsen & Prokofiev 2010:192 [ref. 30790], Møller et al. 2016:Appendix A [ref. 34432] in Bythitidae). Replacement Name. Current status: Valid as Grammonus waikiki (Cohen 1964). Bythitidae. Distribution: Hawaiian Islands. Habitat: marine.