Biology:Tropidolaemus wagleri
| Tropidolaemus wagleri | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Viperidae |
| Genus: | Tropidolaemus |
| Species: | T. wagleri
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| Binomial name | |
| Tropidolaemus wagleri (F. Boie, 1827)
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| Synonyms[2] | |
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Tropidolaemus wagleri, more commonly known as Wagler's pit viper, is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Southeast Asia. There are no subspecies that are recognized as being valid.[3] It is sometimes referred to as the temple viper because of its abundance around the Temple of the Azure Cloud in Malaysia.
Etymology
The specific name, wagleri, is in honour of German herpetologist Johann Georg Wagler.[4]
Description
The Wagler's pit viper is sexually dimorphic: the females grow to approximately 1 m (39 1⁄4 in) in total length (including tail), their bodies being black with yellow stripes. Males, on the other hand, typically do not exceed 75 cm (29 1⁄2 in). Males have large triangular-shaped heads, with relatively thin green bodies. They are almost entirely arboreal, and their tails are prehensile to aid in climbing.
They are found in a wide variety of colors and patterns, often referred to as "phases". In the past, some researchers classified the different phases as subspecies. The phases vary greatly from having a black or brown coloration as a base, with orange and yellow banding, to others having a light green as the base color, with yellow or orange banding, and many variations therein.
Common names
Common names for the Wagler's pit viper include temple viper, temple pit viper,[5] bamboo snake, temple snake, speckled pit viper,[6] and temple pitviper.[7]
Geographic range
The Wagler's pit viper is found in southern Vietnam from the provinces of Minh Hai and Song Be, in southern Thailand recorded from the provinces of Phang Nga, Phuket, Pattani, Surat Thani, Nakhon Si Tammarat, Narathiwat, and Yala, probably distributed throughout the Peninsula in west Malaysia, as well as the island of Penang, in Singapore and in Indonesia on Sumatra, the islands of the Riau Archipelago, Bangka, Billiton, Nias, the Mentawai Islands (Siberut), Natuna, and Karimata.[8] In a revision by Vogel et al (2007), the Wagler's pit viper species complex was differentiated into several taxa, including the resurrection of T. subannulatus. The Western Philippine populations belong to T. subannulatus, but those from Mindanao include snakes assigned to both this species and T. philippensis. Tropidolaemus subannulatus has a wide distribution in Central Indonesia, Malaysia and Philippines, the Wagler's Pit Viper is restricted to mainland Southeast Asia, down to Sumatra and Bangka, West Indonesia."[9]
Habitat
The preferred natural habitat of the Wagler's pit viper is the forest, at altitudes from sea level to 400 m (1,300 ft).[1]
Behavior
Nocturnal and arboreal, the Wagler's pit viper appears quite sluggish, as it remains motionless for long periods of time waiting for prey to pass by. When prey does pass by, or if disturbed, it can strike quickly. From personal experience, these Vipers are very easy to handle and can be safely removed from their arboreal perch for closer inspection. They show no aggression whatsoever.
Feeding
The primary diet of the Wagler's pit viper consists of rodents, birds, and lizards. The pits, one on each side of the head between the eye and the nostril, are capable of detecting temperature difference of as little as 0.003 of a degree Celsius (0.0054 of a degree Fahrenheit).[10]
Reproduction
Sexually mature females of the Wagler's pit viper bear live young by ovoviviparity. Litter size varies from 15 to 41.[11]
Venom
The venom of the Wagler's pit viper contains four novel peptides (Waglerins 1-4). The Waglerins produce fatal respiratory paralysis of adult mice.[12][13] An initial study indicated that micromolar concentrations of Waglerin 1 act both pre- and postsynaptically to inhibit transmission across rat neuromuscular junctions.[14] However, Waglerin-1 is a more potent inhibitor of transmission across the mouse neuromuscular junction.[15] A subsequent study demonstrated that Waglerin-1 inhibited the adult mouse endplate response to acetylcholine with an IC50 of 50 nanomolar. In striking contrast, transmission across neuromuscular junctions of neonatal or transgenic mice lacking the adult acetylcholine receptor was not altered by micromolar concentrations of Waglerin-1.[16] Biochemical studies demonstrated that the exquisite selectivity of Waglerin-1 for the adult mouse acetylcholine receptor relies upon several amino acid residues unique to the epsilon subunit of the adult mouse acetylcholine receptor.[17] Waglerin-1's selectivity for the epsilon-subunit containing acetylcholine receptor of adult mice is complemented by selectivity of small peptide toxins purified from the venom of Conus geographus and Conus pergrandis for the gamma-subunit containing acetylcholine receptor of neonatal skeletal muscle.[18][19] The Waglerins and complementary conotoxins are useful tools to discover the contribution of acetylcholine receptor subunits to synaptogenesis.[20] In addition, study of the Waglerins and related toxic peptides may lead to the discovery of novel molecular targets for drug development. While Waglerin-1 interacts with other members of the ligand-gated superfamily of ion channels, the potency is much less than for inhibition of the adult mouse muscle acetylcholine receptor.[21][22] Structural study suggests that Waglerin-1 may undergo molecular rearrangement that allows for binding to multiple receptors.[23] The actions of Waglerin-1 reverse upon removal of the peptide.
Waglerin-1 is included in some skin creams marketed as wrinkle removers.[24] There is no scientific evidence supporting the manufacturers' suggestion that the Waglerin-1 included in their products relaxes wrinkle producing skeletal muscles.
Taxonomy
The Wagler's pit viper has undergone much taxonomic reclassification over the years and was previously placed in the genus Trimeresurus. However, its distinctly different morphology and venom characteristics set it apart, so that eventually a new genus was erected in which it was placed together with Hutton's viper, Tropidolaemus huttoni.
References
- ↑ 1.0 1.1 Grismer, L.; Chan-Ard, T. (2012). "Tropidolaemus wagleri". IUCN Red List of Threatened Species 2012: e.T192174A2051138. doi:10.2305/IUCN.UK.2012-1.RLTS.T192174A2051138.en. https://www.iucnredlist.org/species/192174/2051138. Retrieved 19 November 2021.
- ↑ McDiarmid RW, Campbell JA, Touré T (1999). Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1. Washington, District of Columbia: Herpetologists' League. 511 pp. ISBN:1-893777-00-6 (series). ISBN:1-893777-01-4 (volume).
- ↑ "Tropidolaemus wagleri ". Integrated Taxonomic Information System. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=634939. Retrieved 25 May 2007.
- ↑ Beolens, Bo; Watkins, Michael; Grayson, Michael (26 July 2011). The Eponym Dictionary of Reptiles. Johns Hopkins University Press. pp. 278. ISBN 978-1-4214-0135-5. https://books.google.com/books?id=3ovZoFyLhzkC&pg=PA278.
- ↑ Mehrtens JM (1987). Living Snakes of the World in Color. New York: Sterling Publishers. 480 pp. ISBN:0-8069-6460-X.
- ↑ U.S. Navy (1991). Poisonous Snakes of the World. New York: United States Government / Dover Publications Inc. 203 pp. ISBN:0-486-26629-X.
- ↑ Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S (2004). Asian Pitvipers. 1st Edition. Berlin: GeitjeBooks. 368 pp. ISBN:3-937975-00-4.
- ↑ "Revision of the Tropidolaemus wagleri complex (Serpentes: Viperidae: Crotalinae). I. Definition of included taxa and redescription of Tropidolaemus wagleri (Boie, 1827)". Zootaxa 1644: 1–40. 2007. doi:10.11646/zootaxa.1644.1.1.
- ↑ Auliya M, Dehling M, Inger RF, Iskandar D, Vogel G, Diesmos AC, Sy E (2012). "Tropidolaemus subannulatus ". The IUCN Red List of Threatened Species. Version 2015.2. www.iucnredlist.org. Downloaded on 30 August 2015.
- ↑ "Wagler's Pit Viper Tropidolaemus wagleri". Wildlife Singapore. http://www.wildsingapore.per.sg/discovery/factsheet/snakewagler.htm.
- ↑ Das, Indraneil (2006). A Photographic Guide to Snakes and other Reptiles of Borneo. Sanibel Island, Florida: Ralph Curtis Books. 144 pp. ISBN:0-88359-061-1. (Tropidolaemus wagleri, p. 58.)
- ↑ "Characterization and amino acid sequences of two lethal peptides isolated from venom of Wagler's pit viper, Trimeresurus wagleri ". Toxicon 29 (2): 227–237. 1991. doi:10.1016/0041-0101(91)90107-3. PMID 2048140.
- ↑ "Molecular properties and structure-function relationships of lethal peptides from venom of Wagler's pit viper, Trimeresurus wagleri ". Toxicon 30 (9): 1027–1137. 1992. doi:10.1016/0041-0101(92)90047-9. PMID 1440639.
- ↑ "A novel peptide toxin from Trimeresurus wagleri acts pre- and post-synaptically to block transmission at the rat neuromuscular junction". Pharmacology & Toxicology 70 (6 Pt 1): 459–462. June 1992. doi:10.1111/j.1600-0773.1992.tb00508.x. PMID 1359525.
- ↑ "Effects of waglerin-I on neuromuscular transmission of mouse nerve-muscle preparations". Toxicon 33 (3): 363–371. March 1995. doi:10.1016/0041-0101(94)00158-5. PMID 7638875. https://zenodo.org/record/1258270.
- ↑ "Waglerin-1 Selectively Blocks the Epsilon Form of the Muscle Nicotinic Acetylcholine Receptor". The Journal of Pharmacology and Experimental Therapeutics 289 (1): 543–550. September 1999. PMID 10087048. http://jpet.aspetjournals.org/content/289/1/543.full.pdf+html.
- ↑ "Residues in the epsilon subunit of the nicotinic acetylcholine receptor interact to confer selectivity of waglerin-1 for the alpha-epsilon subunit interface site". Biochemistry 41 (25): 7895–7906. June 2002. doi:10.1021/bi025732d. PMID 12069578.
- ↑ "A Uniquely Selective Inhibitor of the Mammalian Fetal Neuromuscular Nicotinic Acetylcholine Receptor". Journal of Neuroscience 25 (3): 732–736. January 2005. doi:10.1523/JNEUROSCI.4065-04.2005. PMID 15659611.
- ↑ "Definition and Characterization of the Short alphaA-Conotoxins: A Single Residue Determines Dissociation Kinetics from the Fetal Muscle Nicotinic Acetylcholine Receptor". Biochemistry 45 (4): 1304–1312. November 2006. doi:10.1021/bi052016d. PMID 16430227.
- ↑ "Peptide‐Toxin Tools for Probing the Expression and Function of Fetal and Adult Subtypes of the Nicotinic Acetylcholine Receptor". Annals of the New York Academy of Sciences 1132 (1): 61–70. June 2008. doi:10.1196/annals.1405.015. PMID 18567854. Bibcode: 2008NYASA1132...61T.
- ↑ "Waglerin-1 inhibits GABA(A) current of neurons in the nucleus accumbens of neonatal rats". Brain Research 837 (1–2): 29–37. August 1999. doi:10.1016/s0006-8993(99)01668-6. PMID 10433985.
- ↑ "Waglerin-1 modulates gamma-aminobutyric acid activated current of murine hypothalamic neurons". The Journal of Pharmacology and Experimental Therapeutics 282 (1): 74–80. March 1997. PMID 9223541.
- ↑ "Conformational analysis of a toxic peptide from Trimeresurus wagleri which blocks the nicotinic acetylcholine receptor". Biophysical Journal 70 (1): 3–13. January 1996. doi:10.1016/s0006-3495(96)79559-0. PMID 8770182. Bibcode: 1996BpJ....70....3S.
- ↑ "Euoko, Y-30 Intense Lift Concentrate". http://www.euoko.com/.
Further reading
- Boie F (1827). Bemerkungen über Merrem's Versuch eines Systems der Amphibien, 1te Lieferung: Ophidier. Isis von Oken 20: 508-566. (Cophias wagleri, new species, p. 562). (in German).
- Boulenger GA (1896). Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the ... Viperidæ. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates I-XXV. (Lachesis wagleri, pp. 562–564).
External links
- Tropidolaemus wagleri at the Reptarium.cz Reptile Database. Accessed 12 December 2007.
Wikidata ☰ Q577013 entry
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