Cope ED (1860). "Catalogue of the Colubridæ in the Museum of the Academy of Natural Sciences of Philadelphia, with notes and descriptions of new species. Part 2". Proceedings of the Academy of Natural Sciences of Philadelphia12: 241–266. (Hypsiglena ochrorhynchus, new species, pp. 246–247).
Mocquard F (1899). "Contribution a la faune herpétologique de la Basse-Californie ". Nouvelles Archives du Muséum d'Histoire Naturelle, Quatrième Série1: 297–343 + Plates XI–XIII. (Hypsiglena venusta, new species, p. 327). (in French).
Tanner WW (1943). "Two New Species of Hypsiglena from Western North America". Great Basin Naturalist4 (1 & 2): 49–54. (Hypsiglena nuchalatus, new species, pp. 49–53).
Tanner WW (1946). "A Taxonomic Study of the Genus Hypsiglena ". Great Basin Naturalist5 (3 & 4): 25–92, Plates I–III. (Hypsiglena ochrorhynchus klauberi, new subspecies, pp. 71–74; H. o. tortugaensis, new subspecies, pp. 69–71 + Plate II, figures 3–4). (Nota bene: This issue is dated "1944", but was not published until 1946, due to World War II).
Tanner WW (1954). "Additional Note on the Genus Hypsiglena With a Description of a New Subspecies". Herpetologica10: 54–56. (Hypsiglena torquata gularis, new subspecies).
Tanner WW,
Banta BH (1962). "Description of a new Hypsiglena from San Martín Island, México, with a Resumé of the Reptile Fauna of the island". Herpetologica18 (1): 21–25.
Zweifel RG (1958). "Results of the Puritan-American Museum of Natural History Expedition to Western Mexico. 2. Notes on Reptiles and Amphibians from the Pacific Coastal Islands of Baja California". American Museum Novitates (1895): 1–17. (Hypsiglena torquata baueri, new subspecies, pp. 12–16, Figure 1).