nocturnus, Poecilophis Cope [E. D.] 1872:474 [U. S. Geological Survey Territitories Annual Report v. 5 (pt 4); ref. 923] Río Grande at San Jose, Costa Rica. Holotype: ANSP 14926. Type catalog: Böhlke 1984:130 [ref. 13621], Böhlke & Smith 2002:131-132 [ref. 26380] Locality questioned, San Jose is too far inland -- Smith 2012:6 [ref. 32155]. •Valid as Echidna nocturna (Cope 1872) -- (Böhlke et al. 1989:130 [ref. 13286], Allen & Robertson 1994:43 [ref. 22193], McCosker & Rosenblatt in Fischer et al. 1995:1307 [ref. 22830], Allen & Robertson 1997:818 [ref. 41086], Grove & Lavenberg 1997:148 [ref. 24023], Chirichigno F. & Vélez D. 1998:127 [ref. 24555], Thomson et al. 2000:45 [ref. 25640], Böhlke & Smith 2002:132 [ref. 26380], Nelson et al. 2004:60 [ref. 27807], Love et al. 2005:17 [ref. 37547], Béarez & Séret 2009:145 [ref. 36646], McCosker & Rosenblatt 2010:188 [ref. 30957], Smith 2012:6 [ref. 32155], Page et al. 2013:60 [ref. 32708], Fourriére et al. 2016:441 [ref. 34668], Del Moral-Flores et al. 2016:606 [ref. 34923], González-Murcia et al. 2019:289 [ref. 36544], Dale et al. 2021:311 [ref. 38298], Love et al. 2021:33 [ref. 39279], Grove et al. 2022:15 [ref. 41326], Page et al. 2023:51 [ref. 40505], Vela-Espinosa et al. 2023:5 [ref. 40981], Fricke et al. 2024:113 [ref. 41622]). Current status: Valid as Echidna nocturna (Cope 1872). Muraenidae: Muraeninae. Distribution: Eastern Pacific: Pacific coast of southern Baja California Sur (Mexico) south to Peru, including southern Gulf of California (Mexico), Clipperton Island (France) and Galapagos Islands (Ecuador). IUCN (2010): Least Concern. Habitat: marine.