Description:
Akysidae with the following combination of characters:
snout extending well anterior of margin of lower jaw,
rendering mouth subterminal; narial openings relatively
large and closely set; and caudal fin deeply forked.
This genus corresponds to the “pseudobagarius
group” of species of the genus Akysis
that was first recognized by Ng & Kottelat (1998).
Dorsal soft rays (total): 6 - 6; Anal soft rays: 6
– 8; Vertebrae: 31 – 34. Distinguished
from all its congeners by the following combination
of characters: light-yellow snout with a sharp, contrasted
edge discrete line demarcation; presence of 4-6 small
serrae on the posterior edge of pectoral spine; head
width 20.3-25.5% SL; depth of caudal peduncle 5.5-7.1%
SL; length of anal-fin base 9.7-16.6% SL; length
of nasal barbel 16-38% HL; 5 branchiostegal rays;
and caudal fin deeply emarginate. Etymology:
The genus name Pseudobagarius: Tautonymous
with Akysis pseudobagarius, proposed for
members of the “pseudobagarius group”
of Akysis; pseudo-, false, referring to striking
(but phylogenetically false) resemblance to the sisorid
genus Bagarius. The specific name leucorhynchus:
leuco-,
white; rhynchus, snout, referring to the white end
of muzzle. Remarks:
A look-a-Like, Akysis pulvinatus, is thought
to mimic this catfish in the same habitat, so called
a Müllerian mimic.
Common
Name:
None
Synonyms:
Akysis leucorhynchus
Family:
Akysidae
Distribution:
Asia:
Thailand; Choa Phraya basin and southern Peninsular.
Phitsanulork Province. Type locality:
Chieng Mai, North Siam.
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