longhursti, Oligopus Cohen [D. M.] 1964:8, Pl. 3 [Proceedings of the United States National Museum v. 116 (no. 3494); ref. 6891] Off Lagos, Nigeria, depth 5-10 fathoms. Holotype: USNM 187778. Paratypes: USNM 187779 (1), 191732 (2), 193678 (1). •Valid as Oligopus longhursti Cohen 1964 -- (Cohen & Nielsen 1978:49 [ref. 881], Nielsen 1990:575 [ref. 16246]). •Valid as Grammonus longhursti (Cohen 1964) -- (Nielsen & Cohen in Nielsen et al. 1999:104 [ref. 24448], Nielsen & Cohen 2004:85 [ref. 28073], Nielsen 2007:375 [ref. 29358], Wirtz et al. 2007:26 [ref. 30263], Randall & Hughes 2008:143 [ref. 29910], Nielsen & Prokofiev 2010:192 [ref. 30790], Wirtz et al. 2013:119 [ref. 32972], Møller et al. 2016:Appendix A [ref. 34432] in Bythitidae, Nielsen 2016:1954 [ref. 34583], Reiner 2019:112 [ref. 38139], Fermon et al. 2022:208 [ref. 39448] possible). Current status: Valid as Grammonus longhursti (Cohen 1964). Bythitidae. Distribution: Eastern Atlantic: Ivory Coast to Equaorial Guinea, including Canary Islands, Cape Verde Islands, and São Tomé and Principe. Habitat: marine.