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Papuan black snake

  (Redirected from Pseudechis papuanus)
Papuan Black Snake
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Elapidae
Genus: Pseudechis
Species: P. papuanus
Binomial name
Pseudechis papuanus
Peters & Doria, 1878

The Papuan black snake (Pseudechis papuanus) is a venomous snake of the family Elapidae native to New Guinea.[1]

Contents

TaxonomyEdit

The Papuan black snake is one of several species in the genus Pseudechis commonly known as black snakes. A study of mitochondrial DNA showed the Papuan black snake to be the next closest relative to a pair of Australian species, Collett's Snake (P. collettii) and the blue-bellied black snake (P. guttatus), and is likely to have had its origins in Australia and diverged from a common ancestor in the Pliocene.[2]

DescriptionEdit

Reaching around 2 m (7 ft) in length, it is a predominantly black snake coloured grey underneath.[1]

Geographic rangeEdit

The range is southern New Guinea, both in Papua New Guinea and West Papua province of Indonesia, as well as offshore islands. In Papua New Guinea, it has possibly already vanished from Port Moresby and Central Province and is declining in Western Province.[3] It just enters Australian territory as it occurs on Saibai Island in far northern Torres Strait off the New Guinea coast.[1]

Destruction of its habitat, killing of snakes by locals, and poisoning by the introduced cane toad have contributed to its decline.[3]

VenomEdit

The venom is predominantly neurotoxic in its effects, with muscle weakness and paralysis ensuing over 2 to 21 hours after being bitten. This can be life-threatening and intubation may be required.[4] It is slightly more toxic than the equatorial spitting cobra (Naja sumatrana) and three times less toxic than that of the taipan (Oxyuranus scutellatus).[5] A postsynaptic neurotoxin isolated has been given the name of papuantoxin-1, and can be treated with CSL black snake antivenom (used for the king brown snake (Pseudechis australis)).[6]

Although widely feared in Papua New Guinea's Central Province, it is responsible for only a small minority of snakebites, eclipsed by the more dangerous taipan.[7] The Mekeo people know it as auguma, "to bite again", from its habit of repeatedly biting. Some local people in New Guinea believe it and the taipan to be opposite sexes of the same species. The Kiwai people believe the snake to be an agent of a magic-man known as Ove-devenor who sends it to kill enemies. People bitten will often seek out another magic-man instead of going to a hospital, thus dangerously delaying treatment.[3]

ReferencesEdit

  1. ^ a b c Museum of Tropical Queensland (2011). "Papuan Black Snake". Queensland Museum website. Townsville, Queensland: The State of Queensland (Queensland Museum). Retrieved 15 January 2012. 
  2. ^ Wüster, W., A.J. Dumbrell, C. Hay, C.E. Pook, D.J. Williams & B.G. Fry (2005). "Snakes across the Strait: Trans-Torresian phylogeographic relationships in three genera of Australasian snakes (Serpentes: Elapidae: Acanthophis, Oxyuranus and Pseudechis)." (PDF). Molecular Phylogenetics and Evolution 34(1): 1-14. 
  3. ^ a b c O'Shea, Mark (2008). Venomous Snakes of the World. New Holland Publishers. p. 119. ISBN 1-84773-086-8. 
  4. ^ Lalloo, David; Trevett, Andrew; Black, Julie; et al. (1994). "Neurotoxicity and haemostatic disturbances in patients envenomed by the Papuan black snake (Pseudechis papuanus)" (PDF). Toxicon. 32 (8): 927–36. doi:10.1016/0041-0101(94)90371-9. 
  5. ^ Kamiguti, A.S.; Laing, G.D.; Lowe, G.M.; et al. (1994). "Neurotoxicity and haemostatic disturbances in patients envenomed by the Papuan black snake (Pseudechis papuanus)" (PDF). Toxicon. 32 (8): 915–25. doi:10.1016/0041-0101(94)90370-0. 
  6. ^ Kuruppu, Sanjaya; Reeve, Shane; Smith, A. Ian; Hodgson, Wayne C. (2005). "Isolation and pharmacological characterisation of papuantoxin-1, a postsynaptic neurotoxin from the venom of the Papuan black snake ()". Biochemical Pharmacology. 70 (5): 794–800. doi:10.1016/j.bcp.2005.06.003. PMID 16011833. 
  7. ^ Viner-Smith, Chris (2007). Australia's Forgotten Frontier: The Unsung Police Who Held Our PNG Front Line. chris viner-smith. p. 70. ISBN 0-646-47541-X.