| Lachesis muta | 
|  | 
|  | 
|  | 
| Scientific classification | 
| Domain: | Eukaryota | 
 
| Kingdom: | Animalia | 
 
| Phylum: | Chordata | 
 
| Class: | Reptilia | 
 
| Order: | Squamata | 
 
| Suborder: | Serpentes | 
 
| Family: | Viperidae | 
 
| Genus: | Lachesis | 
| Species: | L. muta | 
| Binomial name | 
| Lachesis muta 
 | 
|
| Synonyms | 
| [Crotalus] mutus Linnaeus, 1766
[Coluber] crotalinus Gmelin, 1788
Scytale catenatus Latreille in Sonnini & Latreille, 1801
Scytale ammodytes Latreille in Sonnini & Latreille, 1801
Coluber alecto Shaw, 1802
Lachesis mutus — Daudin, 1803
Lachesis ater Daudin, 1803
Trigonocephalus ammodytes — Oppel, 1811
[Cophias] crotalinus — Merrem, 1820
Trigonoceph[alus]. crotalinus — Schinz, 1822
Lachesis muta — Schinz, 1822
Lachesis atra — Schinz, 1822
Scytale catenata — Schinz, 1822
Bothrops surucucu Wagler, 1824
C[rasedocephalus]. crotalinus — Gray, 1825
Lachesis mutus — A.M.C. Duméril, Bibron &
 A.H.A. Duméril, 1854
Lachesis mutus — Boulenger, 1896
Lachesis muta — Boettger, 1898
Lachesis muta muta — Taylor, 1951
 | 
Lachesis muta, also known as the Southern American bushmaster or Atlantic bushmaster, is a pit viper species found in South America, as well as the island of Trinidad in the Caribbean. Two subspecies are currently recognized, including the nominate subspecies described here.