Thai National Parks

Trimeresurus hageni, commonly known as the Hagen's pit viper (or Hagen's green pit viper), is a species of pit viper, a venomous snake in the subfamily Crotalinae of the family Viperidae. The species is endemic to Southeast Asia. There are no subspecies which are currently recognized as being valid.

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.

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.

Geographic range

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

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

Reproduction

Trimeresurus hageni is oviparous.

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