Hemitrygon laosensis

(ROBERTS & KARNASUTA, 1987)


Mekong stingray
Classification: Elasmobranchii Myliobatiformes Dasyatidae

Reference of the original description
ROBERTS, T.R. & KARNASUTA, J. (1987)
Dasyatis laosensis, a new whiptailed stingray (family Dasyatidae), from the Mekong River of Laos and Thailand. Environmental Biology of Fishes, 20 (3): 161–167

Image of the original description
Image in copyright.

Synonyms / new combinations and misspellings
Amphotistius laosensis, Dasyatis laoensis, Dasyatis laosensis

Types
Hemitrygon laosensis

Dasyatis laosensis
Holotype: BMNH: 1985.9.26.1; Paratype: BMNH: 1985.9.26.2; NIFI: 1672; NIFI: 1671; NIFI: 132; NRM: 36612;


Description :


Citation: Hemitrygon laosensis (ROBERTS & KARNASUTA, 1987): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2017

Please send your images of "Hemitrygon laosensis" to info@shark-references.com

Hemitrygon laosensis (ROBERTS & KARNASUTA, 1987) © FAO, www.fish-base.org
Common names
eng Mekong freshwater stingray, eng Mekong stingray

Short Description
Distinguished from the other stingray species in the Mekong basin by the presence of a ventral and a dorsal skin folds on the tail and the bright orange color of the ventral surface of the disc. The middle disc is whitish with scattered large orange spots. The dorsal surface of the disc is brown [20214]. Disc longer than wide; tail longer than body [20067]. Lacking caudal fin; with long whip-like tail (Ref. 43281).

Distribution
Asia: Chao Phraya and Mekong basins. Possibly in Borneo. Source: www.gbif.org

Human uses
fisheries: minor commercial

Biology
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures [733]. Distinct pairing with embrace [17086].

Size / Weight / Age
62.0 cm WD (male/unsexed; [20214]); max. published weight: 6,000 g [20214]

Habitat
demersal; potamodromous [17660]; freshwater