en Trimeresurus hageni

Trimeresurus hageni
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Viperidae
Genus:	Trimeresurus
Species:	T. hageni
Binomial name
	Trimeresurus hageni; (Lidth de Jeude, 1886)
Synonyms
	Bothrops Hageni ; Lidth de Jeude, 1886; Lachesis sumatranus (part); — Boulenger, 1896; Trimeresurus hageni ; — Brongersma, 1933; Parias hageni ; — Malhotra & Thorpe, 2004; Trimeresurus (Parias) hageni ; — David et al., 2011;

Trimeresurus hageni, commonly known as Hagen's pit viper^[4] and Hagen's green pit viper,^[1] is a species of venomous snake in the subfamily Crotalinae of the family Viperidae. The species is native to Southeast Asia. There are no subspecies that are recognized as being valid.^[5]

Etymology

The specific name, hageni, is in honor of German naturalist Dr. Bernhard Hagen, who collected mammals, birds, reptiles, and insects in the eastern part of Sumatra.^[6]^[7]

Scalation of T. hageni includes 21 rows of dorsal scales at midbody, 176–198 ventral scales, 63–89 subcaudal scales, and 9–12 supralabial scales.^[4] The lectotype has a total length (including tail) of 97 cm (38 in).^[3]

The type locality given is "Sumatra ... [and] island of Banka". Brongersma (1933) emended this to "Deli, Sumatra".^[2]

The preferred natural habitat of T. hageni is forest, at altitudes of 100–300 m (330–980 ft).^[1]

T. hageni is arboreal and nocturnal.^[1]

T. hageni is oviparous.^[3]

^ ^a ^b ^c ^d ^e Grismer, L.; Chan-Ard, T. (2012). "Trimeresurus hageni ". IUCN Red List of Threatened Species. 2012: e.T191906A2013598. doi:10.2305/IUCN.UK.2012-1.RLTS.T191906A2013598.en. Retrieved 20 November 2021.
^ ^a ^b 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).
^ ^a ^b ^c Species Trimeresurus hageni at The Reptile Database www.reptile-database.org.
^ ^a ^b Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S (2004). Asian Pit vipers. Berlin: GeitjeBooks. 1st Edition. 368 pp. ISBN 3-937975-00-4.
^ "Trimeresurus hageni ". Integrated Taxonomic Information System. Retrieved 28 July 2008.
^ Jentink FA (1888). "On a Collection of Mammals from East-Sumatra". Notes from the Leyden Museum 11 (6):17–30.
^ 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 hageni, p. 113).

Brongersma LD (1933). "Herpetological Notes I-IX". Zoologische Mededeelingen (Leiden) 16: 1-29. (Trimeresurus hageni, new combination).
Das I (2012). A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford, England: John Beaufoy Publishing. 176 pp. ISBN 978-1906780708.
Lidth de Jeude, Th. W. van (1886). "On Cophias Wagleri Boie and Coluber sumatranus Raffles". Notes from the Leyden Museum 8 (10): 43–54. ("Bothrops Hageni", new species, pp. 53–54).
Sanders KL, Malhotra A, Thorpe RS (2002). "A contribution to the systematics of two commonly confused pitvipers from the Sunda Region: Trimeresurus hageni and T. sumatranus ". Bulletin of the Natural History Museum London (Zoology Series) 68 (2): 107–111.

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