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Tachymenis is a genus of venomous snakes belonging to the family Colubridae.

Species in the genus Tachymenis are commonly known as slender snakes or short-tailed snakes and are primarily found in southern South America.

Tachymenis are rear-fanged (opisthoglyphous) and are capable of producing a medically significant bite, with at least one species, T. peruviana, responsible for human fatalities.

[1] The following species are recognized by the Reptile Database.