Template:Echternacht, 1973

• Echternacht, A.C. 1973. The color pattern of Sonora michoacanensis (Dugès) (Serpentes, Colubridae) and its bearing on the origin of the species. Breviora 410: 1–18. BHL  
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Nomenclatural acts

• Date of publication: 20 September 1973
• No new names