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Kingdom Animalia |
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Mixcoatlus Jadin, H. M. Smith and Campbell, 2011 -- valid | |
Mixcoatlus barbouri (Dunn, 1919) -- valid -- Nauyaca-de montańa guerrerense, Barbour's Montane Pitviper | |
Mixcoatlus browni (Shreve, 1938) -- valid -- Brown's Montane Pitviper | |
Mixcoatlus melanurus (Müller, 1924) -- valid -- Black-tailed Horned Pitviper, Nauyaca-nariz de cerdo cornuda | |
Ophryacus Cope, 1887 -- valid | |
Ophryacus smaragdinus Grünwald, Jones, Franz-Chávez and Ahumada-Carrillo, 2015 -- valid -- Emerald Horned Pitviper | |
Ophryacus sphenophrys (H. M. Smith, 1960) -- valid -- Broad-horned Pitviper | |
Ophryacus undulatus (Jan, 1859) -- valid -- Slender-horned Pitviper, Mexican Horned Pit Viper |
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