nigra, Microbrotula Gosline [W. A.] 1953:220 [Copeia 1953 (no. 4); ref. 1859] Off Waikiki reef, Oahu Island, Hawaiian Islands, depth about 30 feet. Holotype (unique): USNM 179898 [ex UH 1684]. Subjectively invalid; secondarily preoccupied by Oligopus niger Risso 1827 when both are in Oligopus, replaced by Oligopus waikiki Cohen 1964. •Synonym of Oligopus waikiki Cohen 1964 -- (Cohen & Nielsen 1978:49 [ref. 881]). •Synonym of Grammonus waikiki (Cohen 1964) -- (Nielsen & Cohen in Nielsen et al. 1999:104 [ref. 24448], Mundy 2005:247 [ref. 28379], Randall & Hughes 2008:137 [ref. 29910]). 2°Homonym. Current status: Synonym of Grammonus waikiki (Cohen 1964). Bythitidae. Habitat: marine.