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Pseudexostoma brachysoma Chu, 1979

Image contributors to this species:

Zhou Hang (1)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: Dorsal soft rays (total): 5; Anal soft rays: 3 - 4. This species is distinguished from Pseudexostoma yunnanense by the following characters: posterior margin of lower lip with 3 notches, depth of middle one shallower than lateral ones (vs. same depth), length of 2 smaller median lobes of lower lip longer than lateral lobes (vs. the same length); pelvic fin i, 3-4 (vs. i, 5); base of adipose fin longer, 36.1-46.0% SL (vs. 28.8-39.8); caudal peduncle more slender, depth 4.2-6.9% SL, 20-33.7% in length of caudal peduncle (vs. 6.4-8.3 and 32.6-42.7); premaxillary tooth band with 16-18 teeth (vs. 18-22), it is divided into 2 and are isolated (vs. connected partially). The species differs from P. longipterus in having a shorter pectoral fin 24.9-29.8% SL (vs. 30.1-31.3), pelvic fin 16.1-22.9% SL (23.1-24.3), and caudal fin 13.6-17.9% SL (vs. 18-19.6); smaller eyes and a narrower interorbital width, eye diameter 5.8-7.8% HL (vs. 8.2-10), interorbital width 19.7-24.7% HL (vs. 25.5-30.8). Etymology: The specific name brachysoma: brachýs, short; sõma, body, proposed as a subspecies of P. yunnanense with a shorter body.

Common Name:

None

Synonyms:

Pseudexostoma yunnanensis brachysoma

Family:

Sisoridae

Distribution:

Asia: Salween drainage, China. Type locality: Hill stream running into the Nu River, near Laowo, Yunlong Xian, Yunnan, China.

Size:

15.0cm. (6ins)

Temp:

18-24°c (64-75°f.)

p.H.

6.0-7.5.

IUCN Red List

Listed as Data Deficient on the basis that this species is restricted to a single river basin where it appears to be uncommon, but while threats have been identified it is unclear whether this species is significantly impacted by these activities, or whether these are primarily ongoing or past threats, and the population trend is unknown, (IUCN 2023).

Reference:

Alfred W. Thomson & Lawrence M. Page; 30 October 2006. Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes) (Zootaxa 1345).
Jiang, W.-S. 2023. Pseudexostoma brachysoma. The IUCN Red List of Threatened Species 2023.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.
Zhou, W., X. Li and Y. Yang, 2008. A review of the catfish genus Pseudecheneis (Siluriformes: Sisoridae) from China, with the description of four new species from Yunnan. Raffles Bull. Zool. 56(1):107-124.

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

Pseudexostoma brachysoma

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