Trachischium is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of colubrid

Colubrid

A colubrid is a member of the snake family Colubridae. This broad classification of snakes includes about two-thirds of all snake species on earth. The earliest species of the snake family date back to the Oligocene epoch. With 304 genera and 1,938 species, Colubridae is the largest snake family...

 snake

Snake

Snakes are elongate, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales...

s commonly known as worm-eating snakes.

Geographic range

They are found through montane regions of the countries of 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...

, 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...

, Bangladesh

Bangladesh

Bangladesh , officially the People's Republic of Bangladesh is a sovereign state located in South Asia. It is bordered by India on all sides except for a small border with Burma to the far southeast and by the Bay of Bengal to the south...

, Bhutan

Bhutan

Bhutan , officially the Kingdom of Bhutan, is a landlocked state in South Asia, located at the eastern end of the Himalayas and bordered to the south, east and west by the Republic of India and to the north by the People's Republic of China...

 and 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...

.

Description

Head not distinct from neck; eye small, with vertically subelliptic pupil; nostril between two small nasals; prefrontals sometimes united. Body cylindrical; dorsal scales smooth, in 13 or 15 rows, without apical pits; ventrals rounded. Tail short; subcaudals divided.

Maxillary teeth 18-20, subequal; posterior mandibular teeth shorter than anterior. Hypapophyses developed throughout vertebral column.

Species

There are five 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...

 in the genus:

• blackbelly worm-eating snake, Trachischium fuscum
  Trachischium fuscum
  The blackbelly worm-eating snake, Trachischium fuscum, is a species of colubrid snake. The specific name, fuscum, is Latin for "dusky" or "dark brown".-Description:...
  
  (Blyth
  Edward Blyth
  Edward Blyth was an English zoologist and pharmacist. He was one of the founders of zoology in India....
  
  , 1854)
• rosebelly worm-eating snake, Trachischium guentheri
  Trachischium guentheri
  The rosebelly worm-eating snake is a species of colubrid snake. The epithet, guentheri, honors Albert Günther , German-born zoologist at the British Museum.-Geographic range:...
  
  Boulenger
  George Albert Boulenger
  George Albert Boulenger FRS was a Belgian-British zoologist who identified over 2000 new animal species, chiefly fish, reptiles and amphibians.-Life:...
  
  , 1890
• olive Oriental slender snake, Trachischium laeve
  Trachischium laeve
  The olive Oriental slender snake is a species of colubrid snake.-Description:The dorsum is uniform grayish brown. The throat, belly, underside of tail, and first row of dorsal scales are yellowish....
  
  Peracca, 1904
• mountain worm-eating snake, Trachischium monticola
  Trachischium monticola
  The mountain worm-eating snake, Trachischium monticola, is a species of colubrid snake.-Geographic range:It is found in India , Bangladesh, Nepal and China ....
  
  (Cantor
  Theodore Edward Cantor
  Theodore Edward Cantor was a Danish physician, zoologist and botanist.Cantor worked for the British East India Company. He made natural history collections in Penang and Malacca...
  
  , 1839)
• yellowbelly worm-eating snake, Trachischium tenuiceps
  Trachischium tenuiceps
  The yellowbelly worm-eating snake is a species of colubrid snake.-Geographic range:It is found in Nepal, Bangladesh, India and Tibet....
  
  (Blyth
  Edward Blyth
  Edward Blyth was an English zoologist and pharmacist. He was one of the founders of zoology in India....
  
  , 1854)