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Eunectes murinus (LINNAEUS, 1758)

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Higher TaxaBoidae (Boinae), Henophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Common NamesE: Anaconda, Green Anaconda
G: Große Anakonda 
SynonymBoa murina LINNAEUS 1758: 215
Boa scytale LINNAEUS 1758: 214
Boa aquatica WIED-NEUWIED 1824
Eunectes murinus — WAGLER 1830: 167
Eunectes murinus — DUMÉRIL & BIBRON 1844: 528
Eunectes murinus — BOULENGER 1893: 115
Eunectes murinus — MCDIARMID, CAMPBELL & TOURÉ 1999: 200
Eunectes murinus gigas (LATREILLE in BUFFON 1801)
Boa gigas LATREILLE 1802
Eunectes barbouri DUNN & CONANT 1936: 504
Eunectes gigas — BEEBE 1946: 20
Eunectes murinus murinus — DUELLMAN 1978: 227
Eunectes murinus — STRIMPLE et al. 1997
Eunectes murinus — STARACE 1998: 111
Eunectes murinus gigas — GORZULA & SEÑARIS 1999
Eunectes murinus gigas — BOOS 2001
Eunectes murinus — WALLACH et al. 2014: 291 
DistributionVenezuela, Colombia, Brazil (Goias, Bahia, Sergipe, Ceara etc.), Ecuador, E Paraguay, N Bolivia, NE Peru, Guyana, French Guiana, Trinidad

Type locality: "America". Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
ReproductionO’Shea et al. (2016) 
TypesHolotype: NRS Lin. 9
Holotype: ANSP 20892, Island of Marajo, at mouth of Amazon [barbouri] 
CommentSynonymy: Eunectes murinus gigas (LATREILLE in BUFFON 1801) was synonymized by DIRKSEN & BÖHME 1998. These authors hypothesized that E. murinus hybridizes with E. notaeus but later realized that these “hybrids” are a new species, E. beniensis. Kaiser et al. 2013 rejected the subgeneric name Maxhoserboa Hoser 2012 and synonymized it with Eunectes.

Size: E. murinus is one of the largest snake species; one specimen reached 8.45 m (BELLOSA 2003), according to other sources 9.6 m (FLINDT 2002). ROBERTSON (1998) mentioned a skin of 29 feet (8.6 m) that also lacked its head and thus must have measured almost 9 m when alive.

Distribution: The map in Trutnau 1982 is erroneous. Compare to map in DIRKSEN (2000).

Diet: Large E. murinus have been documented to feed on calfs, caimans, young tapirs, and other large animals (BARONE 2006).

Type species: Boa scytale LINNAEUS 1758 is the type species of the genus Eunectes WAGLER 1830. 
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