Wikipedia
Loxocemidae
Common names: Mexican python, Mexican burrowing python, Mexican burrowing snake.
The Loxocemidae are a monotypic family of snakes created for the monotypic genus Loxocemus that contains the species L. bicolor found in Mexico and Central America. Loxocemidae is one of the smallest snake families, having just one species and one genus. No subspecies are currently recognized. Analyses of DNA show that Loxocemus is most closely related to the Pythonidae.