Yunnanilus discoloris

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	CYPRINIFORMES	BALITORIDAE

Scientific Name:	Yunnanilus discoloris
Species Authority:	Zhou & He, 1989

Assessment Information [top]

Red List Category & Criteria:	Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published:	2008
Assessor/s:	Chen, X.-Y. & Jiang, Y.-E.
Reviewer/s:	Kullander, F. (Freshwater Fish Red List Authority) & Smith, K. (IUCN Freshwater Biodiversity Assessment Unit)
Justification: Y. discoloris only occurs in one spring of Lake Dianchi, with extent of occurrence and area of occupancy both less than 10 km². The spring is not well protected and it is threatened by introduced species that compete and alter the habitat of the species (including trout and grass carp).

Geographic Range [top]

Range Description:	Only ever known from one tributary spring of Lake Dianchi.
Countries:	Native: China (Yunnan)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Population size is small for restricted distribution.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	In clear spring water. The bottom is sand and some stones with Ceratoph demersum, Spirogyra spp. and some other macrophytes on the ground. The colour pattern between the mature male and female is very distinct.
Systems:	Freshwater

Threats [top]

Major Threat(s):	Current threats at the springs are introduced species and modification of spring structure.

Major Threat(s):

Current threats at the springs are introduced species and modification of spring structure.

Conservation Actions [top]

Conservation Actions:	The spring is not protected.

Conservation Actions:

The spring is not protected.

Bibliography [top]

	Chen, Z.-M., Yang, J.-X., Su, R.-F. and Chen, X.-Y. 2001. Present status of the indigenous fishes in Dianchi Lake, Yunnan. Biodiversity Science 9(4): 407-413. IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008). Zhou, W. and He, J.-C. 1989. A new species of dwarfism in Yunnanilus (Cypriniformes: cobitidae). Acta Zootaxonomica Sinica 14(3): 380-384.

Chen, Z.-M., Yang, J.-X., Su, R.-F. and Chen, X.-Y. 2001. Present status of the indigenous fishes in Dianchi Lake, Yunnan. Biodiversity Science 9(4): 407-413.

IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008).

Zhou, W. and He, J.-C. 1989. A new species of dwarfism in Yunnanilus (Cypriniformes: cobitidae). Acta Zootaxonomica Sinica 14(3): 380-384.

Citation:	Chen, X.-Y. & Jiang, Y.-E. 2008. Yunnanilus discoloris. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 23 May 2012.
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