About Trimeresurus hageni (Lidth De Jeude, 1886)
Trimeresurus hageni, formally described by Lidth De Jeude in 1886, has the following scalation characteristics: 21 rows of dorsal scales at midbody, 176 to 198 ventral scales, 63 to 89 subcaudal scales, and 9 to 12 supralabial scales. The total length of its lectotype, including the tail, measures 97 cm (38 in). This species is geographically distributed across Peninsular Thailand, Peninsular Malaysia, East Malaysia on Borneo, and Indonesia, where it occurs on Sumatra and the nearby islands of Bangka, Simalur, Nias, Batu, and the Mentawai Islands. Its originally given type locality was "Sumatra ... [and] island of Banka", and this was emended to "Deli, Sumatra" by Brongersma in 1933. The preferred natural habitat of Trimeresurus hageni is forest, located at altitudes ranging from 100 to 300 m (330 to 980 ft). This species reproduces via oviparity.
