Murina tenebrosa


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Murina tenebrosa
Species Authority: Yoshiyuki, 1970
Common Name(s):
English Gloomy Tube-nosed Bat, Tsushima Tube-nosed Bat

Assessment Information [top]

Red List Category & Criteria: Critically Endangered D ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Maeda, K.
Reviewer(s): Hutson, A.M., Racey, P.A. (Chiroptera Red List Authority) & Chanson, J. (Global Mammal Assessment Team)
Listed as Critically Endangered (Possibly Extinct), because it has not been collected again since 1962 despite some survey effort and is currently known only from one specimen. There has been significant destruction of the forest on the island from which it was collected, although the habitat requirements of the species are not known. Further surveys are needed to confirm whether or not this species still survives.
2000 Critically Endangered
1996 Data Deficient

Geographic Range [top]

Range Description: This species is known only from the type specimen collected in 1962 from Tsushima Island, Japan (Abe, et al., 2005). There is also a possibility that a bat collected on Yaku Island represents the same species (Abe, et al., 2005).
Possibly extinct:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Recent surveys on Tsushima Island, including both cave searches in winter (2005; K. Armstrong pers. comm.) and mist-netting efforts about 10 years ago during the summer (Maeda pers. comm.), have not recorded this species. The species could possibly be extinct.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The type specimen was collected in a cave, although it could be a tree-hollow or foliage dwelling species dependent on large trees.
Systems: Terrestrial

Threats [top]

Major Threat(s): There is only a small patch of intact forest remaining on Tsushima, but there are very few caves available for roosting.

Conservation Actions [top]

Conservation Actions: This species urgently requires additional surveys, covering the entire island (particularly in the fragments of primary forest remaining in the north and south), and ideally using other trapping techniques (mist-netting is not appropriate). This species is listed as Data Deficient (DD) in the Japanese Red List (2007).

Citation: Maeda, K. 2008. Murina tenebrosa. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 31 August 2015.
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