Beelzebub's tube-nosed bat  (Murina beelzebub), also Beelzebub bat or demon bat, is a species in the vesper bat family Vespertilionidae, found in the Greater Mekong region of Southeast Asia, specifically the Quảng Trị and Gia Lai provinces of Vietnam. They have tube-shaped nostrils (hence the name) which assist them with their feeding.

Discovery and etymology
The Beelzebub bat is one of 126 new species found in the Greater Mekong region described in 2011.
The holotype was collected in November 2007 in Bac Huong Hoa Nature Reserve, which is located in Vietnam.
There were two other tube-nosed bats found in Southeast Asia in 2011: Ashy-gray tube-nosed bat (Murina cineracea) and Walston's tube-nosed bat (Murina walstoni).
All three species are small for bats and M. beelzebub is medium-sized for a Murina bat.
These three new tube-nosed bats were discovered by a team from the Hungarian Natural History Museum (HNHM) and Fauna and Flora International (FFI).
Vespertilionid bats have many cryptic species. Eight new species of vesper bats were found in Southeast Asia between 2005-2009. The use of DNA technology has proved very useful in differentiating between the various species of Murina.

Based on its morphology, it was placed into the suilla species group of the genus Murina. Members of the suilla group include:
Little tube-nosed bat (Murina aurata)
Bala tube-nosed bat (Murina balaensis)
Ashy-gray tube-nosed bat (Murina cineracea)
Eleryi's tube-nosed bat (Murina eleryi)
Slender tube-nosed bat (Murina gracilis)
Murina harpioloides
Greater tube-nosed bat (Murina leucogaster)
Murina recondita
Brown tube-nosed bat (Murina suilla)
Scully's tube-nosed bat (Murina tubinaris)
Ussuri tube-nosed bat (Murina ussuriensis)
Walston's tube-nosed bat (Murina walstoni)
It was named "Beelzebub" and "demon" because of its coloration and fierce behavior, alluding the use of the term "Beelzebub" as reference to the underworld in Christian texts.

Description
This bat is small enough to fit in a person's hand, weighing .
Its nostrils are tube-shaped.
Its color pattern is unique for the regional habitat: a white underbelly, black head, and dark back.
It lacks the golden guard hairs so common in other members of the genus Murina.
Its behavior tends to "flight" before "fight" and it is also quite shy, avoiding human contact.
However, if captured they can be very fierce.
Its forearm is approximately  long.
Its tail is  long, and its hind foot is  long.
Its ears are  long, and its tragus is  long.
Its dental formula is , for a total of 34 teeth.

Biology and ecology
As of 2013, there are still few details known about them and their ecology.
Like other members of its genus, it is insectivorous.

Range and habitat
It lives in tropical forests of the Greater Mekong Subregion.
It has been documented in Kon Ka Kinh National Park and Bac Huong Hoa Nature Reserve, both of which are in Vietnam.
It is suspected there are many more species of bats yet to be discovered in the region.
It has been captured at elevations of  and  above sea level.

Conservation
They are threatened by habitat loss via deforestation.
As it is a relatively new species, it has not yet been evaluated by the IUCN.

See also 

 Peter's tube-nosed bat
 Scully's tube-nosed bat

References

Further reading

 
 
 

Murininae
Bats of Southeast Asia
Endemic fauna of Vietnam
Mekong Delta
Bat, Beelzebub's tube-nosed
Mammals described in 2011