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Hypnale nepa Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Reptilia Order: Squamata Suborder: Serpentes Family: Viperidae Subfamily: Crotalinae Genus: Hypnale Species: H. nepa Binomial name Hypnale nepa (Laurenti, 1768) Synonyms Coluber nepa - Laurenti, 1768 Hypnale nepa - Günther, 1864 Crotalus Hypnale nepa - Higgins, 1873 Ancistrodon nepa - M.A. Smith, 1937 Agkistrodon nepa - Taylor, 1950 Hypnale nepa - Gloyd, 1977[1] Common names: Sri Lankan hump-nosed viper.[2] Hypnale nepa is a venomous pitviper species found in Sri Lanka. Relatively small, they are distinguished by a strongly upturned snout. No subspecies are currently recognized.[3] Contents 1 Description 2 Geographic range 3 See also 4 References 5 External links Description Adults grow to a total length of 30–35 cm. According to Wall (1921), the maximum recorded lengths are for a male of 38.7 cm and a female of 38.1 cm. According to Deraniyagala (1955), the largest specimen in the Colombo museum was 39.2 cm in total length with a tail measuring 5.9 cm. In general, the tail is 13-18% of total body length. The body is moderately slender with a head that is conspicuously distinct from the neck.[2] This species is distinguished from H. hypnale by a snout that has a strongly upturned tip. This is due to an extended rostral scale, which is immediately followed by a raised wartlike hump covered with 7-14 very small scales. Also, the hemipenes have clearly visible spines.[2] The scalation includes 17 rows of dorsal scales at midbody that are weakly keeled or smooth, 124-142 ventral scales and 33-41 subcaudal scales.[2] The color pattern consists of a light brown to dark brown to pale olive ground color, flecked and mottled with darker tones. This is overlaid with a series of 17-26 dorsolateral suboval or subtriangular brown blotches that alternate or oppose each other middorsally. These blotches are 3-4 scales wide and extend down to the third scale row. The top of the head is brown and usually lacks any pattern except for a black postorbital stripe that extends to the neck.[2] Geographic range Found in Sri Lanka throughout forested areas, from lowland rainforest to over 1,800 m altitude. The type locality given is "Africa." An obvious error, this was amended to "Sri Lanka" by Hoge and Romano-Hoge (1981).[1] See also List of crotaline species and subspecies Crotalinae by common name Crotalinae by taxonomic synonyms Snakebite References ^ a b McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume). ^ a b c d e Gloyd HK, Conant R. 1990. Snakes of the Agkistrodon Complex: A Monographic Review. Society for the Study of Amphibians and Reptiles. 614 pp. 52 plates. LCCN 89-50342. ISBN 0-916984-20-6. ^ "Hypnale nepa". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=634894. Retrieved 8 August 2008.  External links Hypnale nepa at the Reptarium.cz Reptile Database. Accessed 8 August 2008. This Alethinophidia article is a stub. You can help Wikipedia by expanding it.v · d · e