Common names: Philippine pitviper.

Trimeresurus flavomaculatus 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 the Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

. 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

According to Leviton (1964), the scalation includes 21 rows of 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...

 at midbody, 170-178/175-184 ventral scales

Ventral scales

In snakes, the ventral scales are the enlarged and transversely elongated scales that extend down the underside of the body from the neck to the anal scale. When counting them, the first is the anteriormost ventral scale that contacts the paraventral row of dorsal scales on either side...

 in males/females, 62-71/58-63 subcaudal scales

Subcaudal scales

In snakes, the subcaudal scales are the enlarged plates on the underside of the tail. These scales may be either single or divided and are preceded by the anal scale....

 in males/females and 9-11 supralabial scales

Supralabial scales

In reptiles, the supralabial scales, also called upper-labials, are those scales that border the mouth opening along the upper jaw. They do not include the median scale . The term labial originates from Labium , which refers to any lip-like structure...

 of which the 3rd is the largest. Toriba and Sawai (1990) give 167-179/172-184 ventral scales

Ventral scales

In snakes, the ventral scales are the enlarged and transversely elongated scales that extend down the underside of the body from the neck to the anal scale. When counting them, the first is the anteriormost ventral scale that contacts the paraventral row of dorsal scales on either side...

 in males/females, 56-70/53-63 subcaudal scales

Subcaudal scales

In snakes, the subcaudal scales are the enlarged plates on the underside of the tail. These scales may be either single or divided and are preceded by the anal scale....

 in males/females and 9-10/9-12 supralabial scales

Supralabial scales

In reptiles, the supralabial scales, also called upper-labials, are those scales that border the mouth opening along the upper jaw. They do not include the median scale . The term labial originates from Labium , which refers to any lip-like structure...

 in males/females.

Geographic range

Found on the Philippine

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 islands of Agutayan, Batan

Batan

Batan may refer to the following places:* Batan, Aklan, a municipality in the Philippines* Batan Island, the main island of the province of Batanes, the Philippines* Batan Island, Albay, in Rapu-rapu, Albay, the Philippines...

, Camiguin

Camiguin

Camiguin is an island province of the Philippines located in the Bohol Sea, about off the northern coast of Misamis Oriental in Mindanao. It is the second-smallest province both in population and land area after Batanes...

, Catanduanes

Catanduanes

Catanduanes is an island province of the Philippines located in the Bicol Region in Luzon. Its capital is Virac and the province lies to the east of Camarines Sur across Maqueda Channel. As of 2007, the population of the province is 232,757 people.-Etymology:"Isla de Cobos" was Catanduanes' first...

, Dinagat, Jolo

Jolo

Jolo may refer to:* Jolo Island* Jolo, Sulu* Jolo, West Virginia* Jolo is also the nickname of Swedish author Jan Olof Olsson....

, Leyte

Leyte

Leyte is a province of the Philippines located in the Eastern Visayas region. Its capital is Tacloban City and occupies the northern three-quarters of the Leyte Island. Leyte is located west of Samar Island, north of Southern Leyte and south of Biliran...

, Luzon

Luzon

Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon...

, Mindanao

Mindanao

Mindanao is the second largest and easternmost island in the Philippines. It is also the name of one of the three island groups in the country, which consists of the island of Mindanao and smaller surrounding islands. The other two are Luzon and the Visayas. The island of Mindanao is called The...

, Mindoro

Mindoro

Mindoro is the seventh-largest island in the Philippines. It is located off the coast of Luzon, and northeast of Palawan. The southern coast of Mindoro forms the northeastern extremum of the Sulu Sea.-History:...

, Negros and Polillo

Polillo

Polilio may refer to:* Polillo Islands, an island group in Quezon Province, the Philippines** Polillo Island, the main island of the Polillo Island Group*** Polillo, Quezon, a municipality on the island...

. The type locality given is "Philippine Islands." Leviton (1964) proposed that this be restricted to "Luzon Island."

Subspecies

Subspecies	Taxon author	Common name	Geographic range
T. f. flavomaculatus	(Gray John Edward Gray John Edward Gray, FRS was a British zoologist. He was the elder brother of George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray .... , 1842)	Philippine pitviper	Philippine Philippines The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...  islands of Agutayan, Bohol Bohol Bohol is an island province of the Philippines located in the Central Visayas region, consisting of Bohol Island and 75 minor surrounding islands. Its capital is Tagbilaran City. With a land area of and a coastline long, Bohol is the tenth largest island of the Philippines... , Camiguin Camiguin Camiguin is an island province of the Philippines located in the Bohol Sea, about off the northern coast of Misamis Oriental in Mindanao. It is the second-smallest province both in population and land area after Batanes... , Catanduanes Catanduanes Catanduanes is an island province of the Philippines located in the Bicol Region in Luzon. Its capital is Virac and the province lies to the east of Camarines Sur across Maqueda Channel. As of 2007, the population of the province is 232,757 people.-Etymology:"Isla de Cobos" was Catanduanes' first... , Dinagat, Jolo Jolo Jolo may refer to:* Jolo Island* Jolo, Sulu* Jolo, West Virginia* Jolo is also the nickname of Swedish author Jan Olof Olsson.... , Leyte Leyte Leyte is a province of the Philippines located in the Eastern Visayas region. Its capital is Tacloban City and occupies the northern three-quarters of the Leyte Island. Leyte is located west of Samar Island, north of Southern Leyte and south of Biliran... , Luzon Luzon Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon... , Mindanao Mindanao Mindanao is the second largest and easternmost island in the Philippines. It is also the name of one of the three island groups in the country, which consists of the island of Mindanao and smaller surrounding islands. The other two are Luzon and the Visayas. The island of Mindanao is called The... , Mindoro Mindoro Mindoro is the seventh-largest island in the Philippines. It is located off the coast of Luzon, and northeast of Palawan. The southern coast of Mindoro forms the northeastern extremum of the Sulu Sea.-History:... , Negros and Panay Panay Panay may refer to*Panay Island*Panay *Panay, Capiz*Panay River*Panay Gulf* USS Panay *Panay incident... .
T. f. halieus Trimeresurus flavomaculatus halieus Trimeresurus flavomaculatus halieus is a venomous pitviper subspecies found in the Philippines.-Geographic range:Found in the Philippines on the island of Polillo. The type locality given is "Island of Polillo, P.I." .-Taxonomy:...	Griffin, 1910		The Philippines on the island of Polillo Polillo Polilio may refer to:* Polillo Islands, an island group in Quezon Province, the Philippines** Polillo Island, the main island of the Polillo Island Group*** Polillo, Quezon, a municipality on the island... .
T. f. mcgregori Trimeresurus flavomaculatus mcgregori Trimeresurus flavomaculatus mcgregori is a venomous pitviper subspecies found in the Philippines.-Description:The scalation includes 21 rows of dorsal scales at midbody, 170-172/173-178 ventral scales in males/females, 62-66/58-60 subcaudal scales in males/females and 10-11 supralabial...	Taylor Edward Harrison Taylor Edward Harrison Taylor was an American herpetologist from Kansas.He was born in Maysville, Missouri and studied at the University of Kansas in Lawrence, Kansas, graduating with a B.A. in 1912. Subsequently, he went to the Philippines, where at first he held a teacher's post in a village in central... , 1919	McGregor's pitviper	The Philippines on the Batanes Islands.

Taxonomy

Gumprecht (2001, 2002) relegates T. f. halieus to synonymy and elevates T. f. mcgregori to a full species.

External links

• Parias (Trimeresurus) flavomaculatus images at Calphotos. Accessed 6 December 2007.