Description:Dorsal soft rays (total):
6; Anal soft rays: 9; Vertebrae: 35 - 36. Distinguished
from all its congeners by the following unique combination
of characters: slender body (body depth at anus 11.9-13.5%
SL); depth of caudal peduncle 5.5-5.8% SL; extremely
narrow head ( head width 17.5-18.7% SL); small and
close set-eyes (eye diameter 7-9% HL; interorbital
distance 33-38% HL); short nasal barbels (23-30% HL);
possession of 35-36 total vertebrae; presence of 1+
3 gill rakers on the first branchial arch; 5-6 serrae
on the posterior edge of the pectoral spine; 8 branchiostegal
rays; caudal fin strongly forked with pointed lobes
(Ref. 30226). Body brown with 2 dark patches along
dorsum at base of dorsal and adipose fins. Remarks:
This species was described as a species of Akysis
in the A. pseudobagarius group from the Mekong
River in northeastern Thailand (Ng and Kottelat 1998).
Ferraris (2007) subsequently assigned this species
and all other members of the A. pseudobagarius
group to the genus Pseudobagarius.
Known only from the Mekong basin in Laos and Thailand.
Ng, H.H. and M. Kottelat,
1998. The catfish genus Akysis Bleeker (Teleostei:
Akysidae) in Indochina, with descriptions of six new
species. J. Nat. Hist. 32:1057-1097. Ng, H.H. 2012. Pseudobagarius subtilis.
The IUCN Red List of Threatened Species 2012. Froese, R. and D. Pauly. Editors.
2019.FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 12/2019 ).