| Mixcoatlus melanurus | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Viperidae |
| Genus: | Mixcoatlus |
| Species: | M. melanurus |
| Binomial name | |
| Mixcoatlus melanurus (L. Müller, 1924) | |
| Synonyms [2] | |
| |
Mixcoatlus melanurus is a pit viper species endemic to the mountains of southern Mexico. No subspecies are currently recognized. [4] [5]
Adults grow to between 37.5 and 50 centimetres (14+3⁄4 and 19+5⁄8 inches) in length and have a moderately stout build. [3] In Mexico, it is called a necazcoatl, from the Nahualt words necaztli and coatl which means "eared-serpent" referring to its "horns".
It is found in two Mexican states, southern Puebla and Oaxaca, at elevations of 1,600–2,400 m (5,200–7,900 ft). The type locality given is "Mexico". [2]
This species is classified as Endangered (EN) on the IUCN Red List of Threatened Species with the following criteria: B1ab(iii) (v3.1, 2001). [1] A species is listed as such when the best available evidence indicates that the geographic range, in the form of extent of occurrence, is estimated to be less than 5,000 km2 (1,900 sq mi), that estimates indicate it to be severely fragmented or known to exist at no more than 5 locations, and that a continuing decline has been observed, inferred or projected, in area, extent and/or quality of habitat. It is therefore considered to be facing a very high risk of extinction in the wild. In 2007 when it was last assessed, the population trend was down. [6]
Terrestrial. [3]
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Exiliboa is a monotypic genus created for the non-venomous dwarf boa species Exiliboa placata, which is endemic to southern Mexico. No subspecies are currently recognized.
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Crotalus lorenzoensis is a species of pit viper.
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Bothriechis aurifer is a pit viper species found in Mexico and Guatemala. No subspecies are currently recognized.
Bothriechis rowleyi is a species of pit viper, a venomous snake, in the subfamily Crotalinae of the family Viperidae. The species is endemic to Mexico. There are no subspecies that are recognized as being valid.
Mixcoatlus barbouri is a pit viper species endemic to Mexico. No subspecies are currently recognized.
Porthidium hespere is a venomous pitviper species found in western Mexico. No subspecies are currently recognized.
Ophryacus undulatus is a venomous pitviper species found in the mountains of central and southern Mexico. No subspecies are currently recognized.
Metlapilcoatlus mexicanus is a pit viper species endemic to Mexico and Central America.
