Common names: Jerdon's pitviper, Jerdon's pit viper.

Trimeresurus jerdonii is a venomous

Venomous snake

"Poisonous snake" redirects here. For true poisonous snakes, see Rhabdophis.Venomous snakes are snakes which have venom glands and specialized teeth for the injection of venom...

 pitviper

Crotalinae

The Crotalinae, commonly known as "pit vipers" or crotaline snakes, are a subfamily of venomous vipers found in Asia and the Americas. They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on either side of the head...

 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 found in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 (Assam

Assam

Assam , also, rarely, Assam Valley and formerly the Assam Province , is a northeastern state of India and is one of the most culturally and geographically distinct regions of the country...

), Burma, Tibet

Tibet

Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people...

, China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 and Vietnam

Vietnam

Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

. Three subspecies

Subspecies

Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...

 are currently recognized, including the nominate subspecies described here.

Description

Males grow to a max total length of 835 mm with a tail length of 140 mm; females 990 mm with a tail length of 160 mm.

Scalation: dorsal scales

Dorsal scales

In snakes, the dorsal scales are the longitudinal series of plates that encircle the body, but do not include the ventral scales.When counting dorsal scales, numbers are often given for three points along the body, for example 19:21:17...

 in 21 longitudinal rows at midbody (rarely 23); snout length a little more than twice diameter of eye; head above, except for large internasals and supraoculars, covered by small, unequal, smooth scales that are feebly imbricate or juxtaposed; first labial completely separated from nasal

Nose

Anatomically, a nose is a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration in conjunction with the mouth. Behind the nose are the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the...

 scales by a suture; internasals separated by 1-2 small scales; 6-9 small scales in line between supraoculars; 7-8 upper labials, third and fourth beneath eye, in contact with subocular or separated by at most a single series of small scales; ventrals: males 164-188, females 167-193; subcaudals: males 50-78, females 44-76.

Geographic range

Found from Assam

Assam

Assam , also, rarely, Assam Valley and formerly the Assam Province , is a northeastern state of India and is one of the most culturally and geographically distinct regions of the country...

 in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, through northern Burma to Tibet

Tibet

Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people...

, China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 (Hupeh, Szechwan and Yunnan

Yunnan

Yunnan is a province of the People's Republic of China, located in the far southwest of the country spanning approximately and with a population of 45.7 million . The capital of the province is Kunming. The province borders Burma, Laos, and Vietnam.Yunnan is situated in a mountainous area, with...

) and Vietnam

Vietnam

Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

. The type locality given is "Khasi Hills

Khasi Hills

The Khasi Hills are part of the Garo-Khasi range in the Indian state of Meghalaya, and is part of the Patkai range and of the Meghalaya subtropical forests ecoregion...

, India.

Subspecies

Subspecies	Taxon author	Common name	Geographic range
T. j. bourreti Trimeresurus jerdonii bourreti Trimeresurus jerdonii bourreti is a venomous pitviper subspecies found in Vietnam.-Description:The scalation includes 21-23 rows of dorsal scales at midbody, 189-192 ventral scales, 65-72 subcaudal scales and 7-8 supralabial scales.-Geographic range:...	Klemmer, 1963	Bourret's pitviper	Northwestern Vietnam Vietnam Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...  (in the provinces of Lao Cai Lao Cai Lào Cai is a city in northeastern Vietnam. It is the capital of Lao Cai province. The city borders the city of Hekou, in the Yunnan province of Southwest China. It lies at the junction of the Red River and the Nam Ti River approximately 160 miles northwest of Hanoi...  and Lai Chau Lai Chau Lai Châu is the capital town of Lai Chau province in the Northwest region of Vietnam.... , and possibly also in adjacent China China Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...  (Yunnan Yunnan Yunnan is a province of the People's Republic of China, located in the far southwest of the country spanning approximately and with a population of 45.7 million . The capital of the province is Kunming. The province borders Burma, Laos, and Vietnam.Yunnan is situated in a mountainous area, with... ).
T. j. jerdonii	Günther Albert C. L. G. Günther Albert Karl Ludwig Gotthilf Günther FRS, also Albert Charles Lewis Gotthilf Günther , was a German-born British zoologist, ichthyologist, and herpetologist.... , 1875	Jerdon's pitviper	Southwestern China (in the provinces of southern Xizang (Tibet) Tibet Autonomous Region The Tibet Autonomous Region , Tibet or Xizang for short, also called the Xizang Autonomous Region is a province-level autonomous region of the People's Republic of China , created in 1965.... , western Sichuan Sichuan ' , known formerly in the West by its postal map spellings of Szechwan or Szechuan is a province in Southwest China with its capital in Chengdu...  and Yunnan), northeastern India India India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world... , Burma (Chin and Kachin state), and northeastern Nepal Nepal Nepal , officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia. It is located in the Himalayas and bordered to the north by the People's Republic of China, and to the south, east, and west by the Republic of India... .
T. j. xanthomelas Trimeresurus jerdonii xanthomelas Trimeresurus jerdonii xanthomelas is a venomous pitviper subspecies found in China.-Description:The scalation includes 21-23 rows of dorsal scales at midbody, 176-188 ventral scales, 54-67 subcaudal scales and 7-8 supralabial scales.-Geographic range:...	Günther, 1889	Red spotted pitviper	Central and southern China, in the provinces of Henan Henan Henan , is a province of the People's Republic of China, located in the central part of the country. Its one-character abbreviation is "豫" , named after Yuzhou , a Han Dynasty state that included parts of Henan... , Shaanxi Shaanxi ' is a province in the central part of Mainland China, and it includes portions of the Loess Plateau on the middle reaches of the Yellow River in addition to the Qinling Mountains across the southern part of this province... , Gansu Gansu ' is a province located in the northwest of the People's Republic of China.It lies between the Tibetan and Huangtu plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, and Shaanxi to the east... , Sichuan Sichuan ' , known formerly in the West by its postal map spellings of Szechwan or Szechuan is a province in Southwest China with its capital in Chengdu... , Guizhou Guizhou ' is a province of the People's Republic of China located in the southwestern part of the country. Its provincial capital city is Guiyang.- History :... , Hubei Hubei ' Hupeh) is a province in Central China. The name of the province means "north of the lake", referring to its position north of Lake Dongting...  and Guangxi Guangxi Guangxi, formerly romanized Kwangsi, is a province of southern China along its border with Vietnam. In 1958, it became the Guangxi Zhuang Autonomous Region of the People's Republic of China, a region with special privileges created specifically for the Zhuang people.Guangxi's location, in... .

External links

• Protobothrops jerdoni, image 1/4 at Uetz Lab. Accessed 25 May 2007.
• Protobothrops jerdoni, image 2/4 at Uetz Lab. Accessed 25 May 2007.
• Protobothrops jerdoni, image 3/4 at Uetz Lab. Accessed 25 May 2007.
• Protobothrops jerdoni, image 4/4 at Uetz Lab. Accessed 25 May 2007.. Accessed 17 August 2007.. Accessed 25 August 2007.. Accessed 25 August 2007.