Common name: two-headed snakes.

Chilorhinophis 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 venomous snake

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...

s found in Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

. Currently, three 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...

 are recognized.

Species

{ ellspacing=0 cellpadding=2 border=1 style="width: 100%; border-collapse: collapse;" Genus Chilorhinophis -- 3 species Species Taxon author Subspecies* Common name Geographic range C. butleri

Chilorhinophis butleri

Chilorhinophis butleri, or Butler's two-headed snake, is a species of venomous snake in the Atractaspididae family. It is endemic to Africa and is found in Sudan....

^T Werner

Franz Werner

Franz Werner was an Austrian zoologist and explorer. Specializing as a herpetologist and entomologist, Werner described numerous species and other taxa of frogs, snakes, insects, and other organisms....

, 1907 ———— Butler's two-headed snake Africa: Mongalla, South Sudan

Mongalla, South Sudan

Mongalla or Mangalla is a community in Central Equatoria state in South Sudan, on the east side of the Bahr al Jebel or White Nile river. It lies about by road northeast of Juba. The towns of Terekeka and Bor lie downstream, north of Mongalla....

. C. carpenteri

Chilorhinophis carpenteri

Chilorhinophis carpenteri, or the Liwale two-headed snake, is a species of venomous snake in the Atractaspididae family.-Geographic range:It is endemic to Africa and is found in Mozambique and southeastern Tanzania.-Etymology:...

(Parker

Hampton Wildman Parker

Hampton Wildman Parker was an English zoologist.Parker was Keeper of Zoology at the Natural History Museum from 1947 to 1957. He is the author of a works on snakes and frogs: Parker discovered the Vesey-Fitzgerald's Burrowing Skink on the Seychelles which he named after entomologist Leslie Desmond...

, 1927) liwalensis Liwale two-headed snake Africa: Mozambique

Mozambique

Mozambique, officially the Republic of Mozambique , is a country in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest...

, southeastern Tanzania

Tanzania

The United Republic of Tanzania is a country in East Africa bordered by Kenya and Uganda to the north, Rwanda, Burundi, and the Democratic Republic of the Congo to the west, and Zambia, Malawi, and Mozambique to the south. The country's eastern borders lie on the Indian Ocean.Tanzania is a state...

. C. gerardi

Chilorhinophis gerardi

Chilorhinophis gerardi, or Gerard's black and yellow burrowing snake, is a species of venomous snake in the Atractaspididae family. It is endemic to Africa, where it is found in southern Democratic Republic of the Congo , Tanzania, Zambia, and Zimbabwe.-References:*Boulenger, G.A. 1913...

(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:...

, 1913) tanganyikae Gerard's black and yellow burrowing snake Africa: southern Democratic Republic of the Congo

Democratic Republic of the Congo

The Democratic Republic of the Congo is a state located in Central Africa. It is the second largest country in Africa by area and the eleventh largest in the world...

, Zambia

Zambia

Zambia , officially the Republic of Zambia, is a landlocked country in Southern Africa. The neighbouring countries are the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west....

, Zimbabwe

Zimbabwe

Zimbabwe is a landlocked country located in the southern part of the African continent, between the Zambezi and Limpopo rivers. It is bordered by South Africa to the south, Botswana to the southwest, Zambia and a tip of Namibia to the northwest and Mozambique to the east. Zimbabwe has three...

, Tanzania

Tanzania

The United Republic of Tanzania is a country in East Africa bordered by Kenya and Uganda to the north, Rwanda, Burundi, and the Democratic Republic of the Congo to the west, and Zambia, Malawi, and Mozambique to the south. The country's eastern borders lie on the Indian Ocean.Tanzania is a state...

.

• ) Not including the nominate subspecies.

^T) Type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

.