Trimeresurus hageni

Trimeresurus hageni, commonly known as Hagen's pit viper and Hagen's green pit viper, 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.

Etymology

The specific name, hageni, is in honor of German naturalist Dr. , who collected mammals, birds, reptiles, and insects in the eastern part of Sumatra.

Description

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. The lectotype has a total length (including tail) of .

Geographic range

T. hageni is found in Peninsular Thailand, Peninsular Malaysia, East Malaysia (Borneo), and Indonesia (Sumatra and the nearby islands of Bangka, Simalur, Nias, Batu, and the Mentawai Islands).

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

Habitat

The preferred natural habitat of T. hageni is forest, at altitudes of .

Behavior

T. hageni is arboreal and nocturnal.

Diet

T. hageni preys upon amphibians and lizards.

Reproduction

T. hageni is oviparous.

References

Further reading

• Brongersma LD (1933). "Herpetological Notes I-IX". Zoologische Mededeelingen (Leiden) 16: 1-29. (Trimeresurus hageni, new combination).
• (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. .
• 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).
• , , (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.