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.[3] The lectotype has a total length (including tail) of 97 cm (38 in).[2]
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".[1]
Habitat
The preferred natural habitat of T. hageni is forest, at altitudes of 100–300 m (330–980 ft).[4]
↑ 1.01.1McDiarmid 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. ISBN1-893777-00-6 (series). ISBN1-893777-01-4 (volume).
↑Jentink FA (1888). "On a Collection of Mammals from East-Sumatra". Notes from the Leyden Museum11 (6):17–30.
↑Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Trimeresurus hageni, p. 113).
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. ISBN978-1906780708.
Lidth de Jeude, Th. W. van (1886). "On Cophias Wagleri Boie and Coluber sumatranus Raffles". Notes from the Leyden Museum8 (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.