Combinations

• Eutaenia hammondii Kennicott, 1860: 332 [original combination]
• Thamnophis hammondii — Stejneger, 1893: 212 [subsequent combination]
• Thamnophis ordinoides hammondii — Grinnell & Camp, 1917: 181 [subsequent combination]
• Thamnophis elegans hammondii — Fox, 1951: 487 [subsequent combination]
• Thamnophis couchii hammondii — Fox & Dessauer, 1964: 266 [subsequent combination]

Synonyms

• Tropidonotus digueti Mocquard, 1899: 327 [synonymized by McGuire & Grismer (1993: 362)]

Syntypes (6): MNHN.

Type locality: “Mulege” (1) and “San Ignacio” (5), Baja California, Mexico.

Primary references

• Kennicott, R. 1860. Descriptions of new species of North American serpents in the museum of the Smithsonian Institution, Washington. Proceedings of the Academy of Natural Sciences of Philadelphia 12: 328–338. BHL Reference page. 
• Stejneger, L.H. 1893. Annotated list of the reptiles and batrachians collected by the Death Valley Expedition in 1891, with descriptions of new species. North American Fauna 7: 159–228. BHL
• Mocquard, F. 1899. Contribution a la faune herpétologique de la Basse-Californie. Nouvelles archives du Muséum d'Histoire naturelle 4ème séries, 1: 297–343 + plates XI-XIII. BHL
• Grinnell, J. & Camp, C.L. 1917. A distributional list of the amphibians and reptiles of California. University of California Publications in Zoology 17(10): 127–208.
• Fox, W. 1951. Relationships among the garter snakes of the Thamnophis elegans rassenkreis. University of California Publications in Zoology 50: 485–530.
• Fox, W. & Dessauer, H.C. 1964. Collection of garter snakes for blood studies. Yearb. Amer. Phil. Soc. 1964: 263–266.
• Mcguire, J.A. & Grismer, L.L. 1993. The taxonomy and biogeography of Thamnophis hammondii and Thamnophis digueti (Reptilia: Squamata: Colubridae) in Baja California, Mexico. Herpetologica 49(3): 354–365. JSTOR

• Wallach, V., Williams, K.L. & Boundy, J. 2014. Snakes of the World: A Catalogue of Living and Extinct Species. CRC Press, Taylor and Francis Group: Boca Raton, Florida. 1237 pp. ISBN 9781138034006 Reference page. 

Additional references

• Rossman, D.A. & Stewart, G.R. 1987. Taxonomic reevaluation of Thamnophis couchii (Serpentes, Colubridae). Occasional Papers of the Museum of Zoology, Louisiana State University 63: 1–25.

Links

• Uetz, P. & Hallermann, J. 2020. Thamnophis hammondii. The Reptile Database. Accessed on 5 May 2018.

• Frost, D.R., Hammerson, G.A. & Hollingsworth, B. 2007. IUCN: Thamnophis hammondii  (Least Concern). The IUCN Red List of Threatened Species 2007: e.T21707A9311793. DOI: 10.2305/IUCN.UK.2007.RLTS.T21707A9311793.en