GBIF occurrence 41661565 from dataset CAS Herpetology Collection Catalog (California Academy of Sciences)
Masticophis flagellum fuliginosus (Animalia:Reptilia:Colubridae)
| Snakes of the islands in the Gulf of California, Mexico Frank S Cliff (1954) Transactions of the San Diego Society of Natural History 12(5): 67-98 |