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Acrochordonichthys rugosus (Bleeker, 1847)

Image contributors to this species:

Adrian Taylor (1) Johnny Jensen's Photographic Library (2) Pier Aquatics (1) Upscale Aquatics (1)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: Dorsal spines (total): 1; Dorsal soft rays (total): 4 - 5; Anal soft rays: 8 - 10; Vertebrae: 35 - 37. Long nasal barbels 6.5-15.6%HL. Lateral margins of head, steeply sloping; convex snout when viewed dorsally. Adipose fin with angular posterior margin. Pectoral spine with serrations on the posterior edge. Colouration: Generally dark brown with many irregular light brown patches. Habitat: Inhabits clear, swiftly flowing forested streams with pH of 7 and sandy or rocky bottoms. Hides under submerged logs or rocks with some leaf litter in the swifter parts of the stream. Etymology: The genus name Acrochordonichthys: akrochordon, wart, referring to tuberculate skin; ichthys, fish. The specific name rugosus: Rugose or wrinkled, referring to “glandular-verrucose” skin (translation), with warts (tubercles) on head, snout, cheeks, back, flanks and belly. Remarks: A predatory fish, ambushing balitorid loaches of Nemacheilus and sisorid catfish of the genus Glyptothorax.

Common Name:

None

Synonyms:

Pimelodus rugosus, Acrochordonichthys zonatus, Pimelodus zonatus, Acrochordonichthys platycephalus, Acrochordonichthys buettikoferi, Acrochordonichthys obscurus, Acrochordonichthys varius.

Family:

Akysidae

Distribution:

Asia: Solo, Ciliwung, Citarum River basins, Java; Barito, Kapuas, Mahakam and Rajang River basins, Borneo; Bernam, Terengganu, Mae Nam Sungai Kolok and Pattani River basins, peninsular Malaysia and Thailand; Musi and Tulangbawan River basins, Sumatra. Type locality: Java.

Size:

12.0cm (4¾ins)

Temp:

18-24°C (63-75°F)

p.H.

6.7-7.2.

IUCN Red List

This species is widely distributed across Java, Borneo, Peninsular Malaysia, southern Thailand, and Sumatra. Extent of occurrence is estimated at 1.2 million km2. The number of locations where this species occurs likely exceeds ten. On a range-wide scale, there are no major pervasive threats to this species. Regional threats include deforestation resulting from logging and land conversion for agriculture. In Java, localised threats have likely resulted in a reduction in habitat quality. Given a broad distribution, large number of locations and subpopulations, and lack of major pervasive threats, this species is assessed as Least Concern (IUCN 2019).

Reference:

Ng, H.H. 2019. Acrochordonichthys rugosus. The IUCN Red List of Threatened Species 2019.
Ng, H.H. and P.K.L. Ng 2001 A revision of the akysid catfish genus Acrochordonichthys Bleeker. J. Fish Biol. 58:386-418.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.

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

Acrochordonichthys rugosus

Acrochordonichthys rugosus

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