Description:
This genera has a posterier nostril located near anterior
nostril. Barbels are ribbon shaped, with a mandibular
and a mental pair on lower jaw. 6 pelvic fin rays.
There are two species in this genus. L. hexanema
and L.
longibarbus.
Compared to L. laides, this species differs
in having a shorter anal fin base (34.8-37.9 SL versus
38.6-41.5% SL) with less anal fin rays (39-42 versus
41-47), a larger eye (eye diameter 28.6-38.5 HL versus
20.1-23.6% HL) and a smaller interorbital distance
( 37.9-47.3 HL versus 47.0-55.6%). Found in large
rivers and feeds on small fishes. Oviparous, eggs
are unguarded. Etymology: The genus
name Laides: –ides, descendant of:
replacement name for Lais Bleeker 1858, preoccupied
by Lais Gistel 1848 in Tunicata (Lais is Sundanese
name for L. hexanema). The specific name
hexanema: hexa-, six; nema, thread, referring
to the three pairs of fleshy barbels. Remarks:Laides hexanema is still listed in Fishbase
as belonging to the Schilbeidae family but it is updated
in The Catalog of Fishes as the current status of
being a member of the Ailiidae family.
Common
Name:
None
Synonyms:
Pangasius hexanema
Family:
Ailiidae
Distribution:
Asia:
Thailand to Indonesia, in large rivers, including
the Mekong. Type locality: Palembang,
Batavia.
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