Trimeresurus popeiorum

Trimeresurus popeiorum is a species of venomous pit viper in the family Viperidae. The species is native to northern and northeastern parts of India, Southeast Asia, and parts of Indonesia. Common names include: Pope's pit viper, Pope's tree viper,[4] and Pope's bamboo pitviper.[5] Two subspecies are currently recognized, including the nominate subspecies described here.[6]

Female

Juvenile male

Trimeresurus popeiorum
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Viperidae
Genus:	Trimeresurus
Species:	T. popeiorum
Binomial name
Trimeresurus popeiorum M.A. Smith, 1937
Synonyms
Trimesurus elegans (part) — Gray, 1853 Trimeresurus gramineus (part) — C. Pope & S. Pope, 1933 Trimeresurus popeiorum [sic] M.A. Smith, 1937 Trimeresurus popeorum [sic] M.A. Smith, 1943 Trimeresurus popeorum — Taylor & Elbel, 1958 Trimeresurus popeorum popeorum — Regenass & Kramer, 1981 Trimeresurus popeorum popeorum — Golay et al., 1993[2] Popeia popeiorum — Malhotra & Thorpe, 2004 Trimeresurus popeiorum — David et al., 2009 Trimeresurus (Popeia) popeiorum — David et al., 2011[3]

Description

Trimeresurus popeiorum may grow to a total length of 770 mm (30 in), which includes a tail length 170 mm (6.7 in).[7]

Above green, below pale green to whitish, the two separated by a bright bicolored orange or brown (below) and white (above) (males) or white (females) ventrolateral stripe, which occupies the whole of the outermost scale row and a portion of the second row.[7]

Dorsal scales in 21 (rarely 23) longitudinal rows at midbody; 9-11 upper labials, first upper labials separated from nasals by a distinct suture; a single supraocular. Ventrals 155-169; subcaudals 52-76, in males the base of the tail enlarged to the level of subcaudals 20-25; hemipenes long and slender, smooth, without spines.[7]

This species is most often confused with T. s. stejnegeri (q.v.); the two have quite distinct hemipenes, which does not make identification of individuals in the field or in the laboratory any easier without recourse to (a) male individuals and (b) an examination of the hemipenes. However, the two species are not known to have overlapping distributions, at least based on available materials. Also, closely allied to T. popeiorum is Trimeresurus yunnanensis (q.v.); ordinarily, the two are more easily told apart by the number of midbody dorsal scale rows, 21 in T. popeiorum, 19 in T. yunnanensis.[7]

Adult male Pope's pit viper, Trimeresurus popeiorum

• 
  Adult male Trimeresurus popeiorum

Geographic range

Northern and northeastern India (Mizoram), Burma, Thailand, West Malaysia and Vietnam. In Indonesia, it occurs on the islands of Sumatra, Mentawai Islands (Siberut, Sipora, North Pagai) and Borneo. The type locality, designated by lectotype, is listed as "Khasi Hills, Assam" (India).[2]

Gumprecht et al. (2004) consider records for Bangladesh, Cambodia and Vietnam to be highly questionable, as they are likely based on misidentifications involving other species of Trimeresurus.[5]

Subspecies

Subspecies[6]	Taxon author[6]	Common name[5]	Geographic range[5]
T. p. barati	Regenass & Kramer, 1981	Barat pit viper	Indonesia: Sumatra (Barat District), the Mentawai Archipelago (on Siberut, North Pagai and South Pagai), and Simeulue (Simalur).
T. p. popeiorum	M.A. Smith, 1937	Pope's pit viper	Northeastern India, Burma, Thailand, West Malaysia, Singapore and Laos.

Taxonomy and etymology

The specific name, popeiorum (Latin, genitive, plural), is in honor of two American herpetologists, Clifford H. Pope and Sarah H. Pope, his wife.[8]

There are differences in opinion as to the correct spelling of the specific epithet. The following is from David and Vogel (1996):[9]

This species was named in honour to Clifford H. Pope and Sarah H. Pope. The original spelling of the specific epithet, popeiorum, was corrected into popeorum by Smith (1943:518) on the basis that it was indeed a clerical error. Unfortunately, according to the Art. 32 (c, ii) of the Code (ICZN, 1985), such a change does not fall into the category of a “correction of an incorrect original spelling." According to the Art. 33 (d), the use of a termination -orum in a subsequent spelling of a species-group name that is a genitive based upon a personal name in which the correct original spelling terminates with -iorum, is an incorrect subsequent spelling, even if the change is deliberate. The original spelling, popeiorum, must therefore be conserved.

Habitat

Trimeresurus popeiorum is found in forests of mountainous regions.[10]

Behavior

Trimeresurus popeiorum is nocturnal and arboreal. If threatened, it will vibrate its tail.[10]

Diet

Trimeresurus popeiorum preys upon frogs, lizards, birds, and rodents (especially rats and squirrels).[10]

Reproduction

This species, T. popeiorum, is viviparous. In India, sexually mature females give birth in April and May, and the average clutch size is 10. The hatchlings are about 180 mm (7.1 in) long.[10]

Venom

Trimeresurus popeiorum possesses a potent neurotoxic venom which is dangerous to humans.[10]

References

1. "Popeia popeiorum ". http://oldredlist.iucnredlist.org/details/192243/0
2. McDiarmid RW, Campbell JA, Touré TA (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).
3. "Trimeresurus popeiorum ". The Reptile Database. www.reptile-database.org.
4. United States Navy (1991). Poisonous Snakes of the World. New York: United States Government/Dover Publications Inc. 203 pp. ISBN 0-486-26629-X.
5. Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S (2004). Asian Pitvipers. First Edition. Berlin: Geitje Books. 368 pp. ISBN 3-937975-00-4.
6. "Trimeresurus popeorum ". Integrated Taxonomic Information System. Retrieved 5 November 2006.
7. Leviton AE, Wogan GOU, Koo MS, Zug GR, Lucas RS, Vindum JV (2003). "The Dangerously Venomous Snakes of Myanmar, Illustrated Checklist with Keys". Proc. Cal. Acad. Sci. 54 (24): 407-462.
8. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Trimeresurus popeiorum, p. 209).
9. David P, Vogel G (1996). The Snakes of Sumatra: An annotated checklist and key with natural history notes. Frankfurt am Main: Edition Chimaira. 259 pp. ISBN 3-930612-08-9.
10. Das I (2002). A Photographic Guide to Snakes and other Reptiles of India. Sanibel Island, Florida: Ralph Curtis Books. 144 pp. ISBN 0-88359-056-5. ("Trimeresurus popieorum", p. 67).

Further reading

• Gumprecht A (2001). "Die Bambusottern der Gattung Trimeresurus Lacépède Teil IV: Checkliste der Trimeresurus-Arten Thailands ". Sauria 23 (2): 25-32. (in German).
• Smith MA (1937). "The Names of two Indian Vipers". J. Bombay Nat. Hist. Soc. 39 (4): 730-731. (Trimeresurus popeiorum, new scientific name, p. 730).
• Tu MC et al. (2000). "Phylogeny, Taxonomy, and Biogeography of the Oriental Pit Vipers of the Genus Trimeresurus (Reptilia: Viperidae, Crotalinae): A Molecular Perspective". Zoological Science 17: 1147-1157.

External links

• Trimeresurus popeiorum at the Reptarium.cz Reptile Database. Accessed 6 December 2012.