Cat-eLog Right Arrow Pangasiidae Right Arrow Helicophagus

Down arrow Cat-eLog Data Sheet
Scientific Name Helicophagus leptorhynchus  Ng & Kottelat, 2000
Common Name Patin Muncung (Indonesia)
Type Locality Mun River at Bung Wai, about 7 kilometers west of Ubon Ratchathani, 15°12'30''N, 104°47'30''E, Ubon Ratchathani Province, Thailand.
Etymology From the Greek leptos (slender)and rhynchos (snout), in reference to the relatively slender snout of this species.
Down arrow Species Information
Size 472mm or 18.6" SL. Find near, nearer or same sized spp.
Identification Helicophagus have a short and a large premaxillary toothplate; the vomerine toothplate without additional toothplate; the front border of the snout is pierced by anterior nostrils; the posterior nostrils are between and in line with the anterior nostrils and the middle of eye; a narrow mouth (<35% HL); a slender anterior part of snout length (<16.5% HL) (Gustiano & Pouyaud, 2008, Indonesian Aquaculture Journal, 3(1), 13-22. http://dx.doi.org/10.15578/iaj.3.1.2008.13-22).

Head short and slender. Eye diameter 15.3-27.8% HL. Mouth subterminal; premaxillary and vomerine teeth conical; vomerine toothplate length 5.1-8.9% HL; vomerine toothplate length is about one and a half premaxillary toothplate length. Maxillary barbels nearly or reaching beyond border of operculum; mandibular barbels reaching beyond the isthmus. First branchial arch with 10-18 gill rakers. Body narrow and elongated; predorsal distance long; prepectoral and prepelvic distance short. Anal fin base high and long with 35-41 fin rays. Color in life: Body silvery to grey or pinkish, dorsal, anal, caudal and pelvic fins reddish.
General Remarks See also, Grudpan, C. et al. (2016). Kasetsart University Fisheries Research Bulletin, 40, pp. 26-38, and Gustiano, R. et al. (2019). Indonesian Fisheries Research Journal, 25(2), pp. 123-131.
Down arrow Habitat Information
Distribution Asia: Chao Phraya and Mekong River drainages in Indochina.
Thailand Waters, Chao Praya (click on these areas to find other species found there)
Mekong (click on these areas to find other species found there)

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IUCN Red List Category Data Deficient, range map and more is available on the IUCN species page. Last assessed 2011.
Other Parameters H. leptorhynchus in the Mekong stays in permanent river channels and does not move into the flooded forest. This species migrates upstream when water levels begin to rise at the beginning of the flood season and moves downstream as the water clears at the end of the flood season.
Down arrow Husbandry Information
Feeding Gut contents of wild-caught specimens include primarily gastropod and bivalve mollusks. Food selection varies with age and size: Younger, smaller fish eat gastropods; as fish grow, food choice expands to include bivalves (Grudpan et al., 2016).
Breeding Unreported.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Raffles Bulletin of Zoology v. 48 (no. 1), pp 55, Figs. 1, 2a.
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Last Update 2020 Jan 07 00:57 (species record created: 2008 Jun 24 18:31)