byrnei, Ethadophis Rosenblatt [R. H.] & McCosker [J. E.] 1970:499, Figs. 4, 6b [Pacific Science v. 24 (no. 4); ref. 3809] Puertocitos, Gulf of California, Baja California Norte, Mexico. Holotype (unique): SIO 67-31. •Valid as Ethadophis byrnei Rosenblatt & McCosker 1970 -- (McCosker 1977:72 [ref. 6836], McCosker et al. 1989:342 [ref. 13288], McCosker & Rosenblatt in Fischer et al. 1995:1334 [ref. 22830], Nelson et al. 2004:62 [ref. 27807], Page et al. 2013:62 [ref. 32708], Romero-Berny & López-Vila 2019:289 [ref. 36970], Page et al. 2023:54 [ref. 40505], Fricke et al. 2024:122 [ref. 41622]). Current status: Valid as Ethadophis byrnei Rosenblatt & McCosker 1970. Ophichthidae: Ophichthinae. Distribution: Eastern Pacific: northwestern Gulf of California (Mexico) south to Gulf of Tehuantepec (Mexico). Habitat: marine.