Agkistrodon browni Shreve, 1938 Mixcoatlus browni (commonly known as Brown's montane pit viper,[1][2] sometimes Mexican montane pitviper[3]) is a species of pit viper found at high elevations in Guerrero, Mexico.

This species was previously placed in the genus Agkistrodon, where it was considered to be a junior synonym of Cerrophidion barbouri.

Molecular evidence has since demonstrated that M. browni is a distinct species and the genus name was subsequently changed.

[3] The genus Mixcoatlus is derived from the Nahuatl word Mixcoatl or "cloud serpent", a deity of the Aztec and several other Mesoamerica civilizations.

[3] Mixcoatlus browni is constricted to the cloud forests of western Sierra Madre del Sur in Guerrero, Mexico.