River catfish

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River catfish
Acrochordonichthys rugosus, drawing from the first description by Pieter Bleeker.

Acrochordonichthys rugosus , drawing from the first description by Pieter Bleeker .

Systematics
Overcohort : Clupeocephala
Cohort : Otomorpha
Sub-cohort : Ostariophysi
Otophysa
Order : Catfish (Siluriformes)
Family : River catfish
Scientific name
Akysidae
Gill , 1861

The river catfish (Akysidae) are a fish family from the order of the catfish-like (Siluriformes). They occur in the fast-flowing waters of Southeast Asia in Myanmar , Thailand and Malaysia as well as Java , Sumatra and Borneo .

features

River catfish are small fish, usually two to five, maximum about 15 centimeters in length. They are usually well camouflaged and live hidden. The head, body and fins are covered by small nodules similar to those of the mountain catfish (Sisoridae). Rows of enlarged nodules run along the body. The skin is regularly stripped and renewed. The head has a pair of small eyes and four pairs of barbels . The dorsal fin has a short base and a strongly developed hard ray, and usually four or five soft rays. An adipose fin is usually present. The pectoral fins have a strong, mostly serrated hard ray. The swim bladder is somewhat reduced.

Systematics

The river catfish are assigned to the superfamily Sisoroidea, which, according to molecular biological investigations, is placed in the “Big Asica” group.

Within the family, a distinction is made between two subfamilies with a total of four or five genera and about 30 species :

swell

Individual evidence

  1. ^ Joseph S. Nelson: Fishes of the world . 4th edition. John Wiley & Sons, Hoboken 2006, ISBN 978-0-471-25031-9 , pp. 164 .
  2. JP Sullivan, Lundberg JG; Hardman M: A phylogenetic analysis of the major groups of catfishes (Teleostei: Siluriformes) using rag1 and rag2 nuclear gene sequences . In: Mol Phylogenet Evol. . 41, No. 3, 2006, pp. 636-62. doi : 10.1016 / j.ympev.2006.05.044 .
  3. River catfish on Fishbase.org (English)

Web links