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Pseudexostoma yunnanense (Tchang, 1935)

Image contributors to this species:

Freshwater Fishes of China in Coloured Illustrations (2)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: Dorsal soft rays (total): 5; Anal soft rays: 3 - 4. This species is distinguished from Pseudexostoma brachysoma and P. longipterus by the following characters: posterior margin of lower lip with 3 notches, depth of middle one the same as lateral ones lateral ones (vs. shallower), length of 2 smaller median lobes of lower lip the same length as lateral lobes (vs. longer); pelvic fin I, 1-5 (vs. I, 3-4); base iof adipose fin shorter, 28.8-39.8% SL (vs. 36.1-46.0); caudal peduncle deeper, depth 6.4-8.3% SL, 32.6-42.7% in length of caudal peduncle (vs. 4.2-6.9 in depth and 20-33.7 in length); premaxillary tooth band with 18-22 teeth (vs. 16-18), it is divided into 2 and are connected partially. Etymology: The specific name yunnanense: –ense, Latin suffix denoting place: Yunnan Province, China, where it is endemic to the Irrawaddy River drainage.

Common Name:

None

Synonyms:

Exostoma yunnanensis, Glyptosternum yunnanensis, Pseudexostoma yunnanensis, Pseudexostoma yunnanensis yunnanensis

Family:

Sisoridae

Distribution:

Asia: Irrawaddy drainage, Yunnan, China. Type locality: Yunnan, China.

Size:

11.0cm. (4¼ins)

Temp:

18-24°c (64-75°f.)

p.H.

6.5-7.5.

IUCN Red List

The species is currently found only in Daying Jiang. This torrent fish is severely threatened by river damming, as well as overfishing and invasive species. Based on its restricted distribution, with an extent of occurrence of 150-2,225 km2 and fewer than five locations, along with continuing decline in habitat quality, it is assessed as Endangered B1ab(iii), (IUCN 2024).

Reference:

Alfred W. Thomson & Lawrence M. Page; 30 October 2006. Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes) (Zootaxa 1345).
Chen, X.-Y. 2024. Pseudexostoma yunnanense. The IUCN Red List of Threatened Species 2024.
Freshwater Fishes of China in Coloured Illustrations vol2 p154.
Froese, R. and D. Pauly. Editors. 2011. FishBase. World Wide Web electronic publication. www.fishbase.org, version.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.

Family: Sisoridae Back to Ident-A-Cat Click on Thumbnails

Pseudexostoma yunnanense

Pseudexostoma yunnanense
Mouth view

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