brunneus, Ilyophis Gilbert [C. H.] 1891:352 [Proceedings of the United States National Museum v. 14 (no. 856); ref. 1625] Near San Cristóbal Island [Chatham Island], Galápagos Islands, 0°36'30"S, 89°19'00"W, Albatross station 2808, depth 634 fathoms. Holotype (unique): USNM 44403. Type catalog: Smith 1994:37-38 [ref. 21917]. •Valid as Ilyophis brunneus Gilbert 1891 -- (Blache et al. 1973:253 [ref. 7185], Machida in Masuda et al. 1984:26 [ref. 6441], Machida in Okamura & Kitajima 1984:83, 316 [ref. 8057], Castle 1986:189 [ref. 5644], Okamura & Machida 1987:109 [ref. 22279], Scott & Scott 1988:88 [ref. 25518], Robins & Robins 1989:235 [ref. 13287], Paulin et al. 1989:71 [ref. 24556], McAllister 1990:47 [ref. 14674], Boschung 1992:33 [ref. 23239], Shinohara et al. 1996:157 [ref. 26605], Sulak & Shcherbachev 1997:1163 [ref. 22986], Arruda 1997:59 [ref. 24952], McEachran & Fechhelm 1998:247 [ref. 23897], Chen & Mok 1999:60 [ref. 24093], Smith 1999:1661 [ref. 24661], Karmovskaya & Parin 1999:316 [ref. 24869], Nakabo 2000:212 [ref. 25086], Pakhorukov 2001:377 [ref. 25409], Chen & Mok 2001:79 [ref. 25465], Sheiko & Fedorov 2000:16 [ref. 25650], Shinohara et al. 2001:292 [ref. 25995], Nakabo 2002:212 [ref. 26001], Smith 2003:723 [ref. 26989], Moore et al. 2003:173 [ref. 27076], Shinohara et al. 2005:400 [ref. 28370], Paxton et al. 2006:262 [ref. 28995], Melo 2007:315 [ref. 29141], Melo et al. 2009:13 [ref. 30460], Ho et al. 2015:179 [ref. 34130], Smith 2016:1651 [ref. 34556], Vieira et al. 2016:[4] [ref. 34869] as cf. brunneus, Robertson et al. 2017:33 [ref. 35676], Fricke et al. 2018:42 [ref. 35805], Carneiro et al. 2019:58 [ref. 37250], Vo et al. 2021:190 [ref. 38239], Tashiro & Chen 2022:4 [ref. 39512], Page et al. 2023:51 [ref. 40505], Fricke et al. 2024:112 [ref. 41622], Tighe et al. 2024:52 [ref. 41546]). Current status: Valid as Ilyophis brunneus Gilbert 1891. Synaphobranchidae: Ilyophinae. Distribution: Circumtropical, discontinuous. Habitat: marine.