Gymnura marmorata (Cooper, 1864) .

California Butterfly Ray. To 157 cm (61.8 in) DW (Jonathan Williams, pers. comm. to M.L.). Point Conception, California (Miller and Lea 1972) through Baja California Peninsula, and eastern Gulf of California, and to at least El Chuyudo (28°19.2’N), Sonora, Mexico (Smith et al. 2009). Benthic; depth: intertidal to 94 m (308 ft) (min.: Carlisle et al. 1960; max.: Amezcua Linares 1996). Records from south of Gulf of California are likely misidentified Gymnura crebripunctata (Peters, 1869) (Last et al. 2016), or Gymnura afuera Hildebrand, 1946 .