Species that contain: Bathyraja and microtrachys [ 1 ] records microtrachys, Raja Osburn [R. C.] & Nichols [J. T.] 1916:142, Fig. 1 [Bulletin of the American Museum of Natural History v. 35 (art. 16); ref. 15062] Southwest of San Diego, California, U.S.A., about 31°N, Albatross station 5673, depth 1090 fathoms. Holotype (unique): USNM 87538 [ex AMNH 5198]. Species misspelled microstachys in caption to Fig. 1. Locality changed in Townsend & Nichols 1925:6 [ref. 4420]. •Synonym of Bathyraja trachura (Gilbert 1892) -- (Castro-Aguirre & Espinosa Pérez 1996:27 [ref. 22793], Mecklenburg et al. 2002:105 [ref. 25968], Dyldin 2015:66 [ref. 34524], Weigmann 2016:97 [ref. 34211]). •Valid as Bathyraja microtrachys (Osburn & Nichols 1916) -- (Compagno 1999:488 [ref. 25589], Love et al. 2005:11 [ref. 37547], Del Moral-Flores et al. 2016:110 [ref. 34398], Last et al. 2016:26 [ref. 34941] with remarks, Last et al. 2016:401 [ref. 35005], Ebert et al. 2017:58 [ref. 35618], Burton & Lea 2019:98 [ref. 37205], Orr et al. 2019:41 [ref. 37029], Love et al. 2021:25 [ref. 39279], Knuckey & Ebert 2022:33 [ref. 39306], Page et al. 2023:45 [ref. 40505], Fricke et al. 2024:92 [ref. 41622]). Current status: Valid as Bathyraja microtrachys (Osburn & Nichols 1916). Arhynchobatidae. Distribution: Northeastern Pacific: southern British Columbia (Canada) south to Pacific coast of central Baja California (Mexico); Gulf of California (Mexico). Habitat: marine.
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