Journal Article
Systematic revision of Pangasius polyuranodon (Siluriformes, Pangasiidae) with description of two new species
Pouyaud, L., Gustiano, R. and Teugels, G.G.
Record Number:
5260
Year:
2002
Journal:
Cybium
Pages:
243-252
Volume:
26
Abstract:
ABSTRACT. - A detailed morphological study is performed on the widespread species Pangasius polyuranodon Bleeker,
1852 and reveals the existence of two new species. Pangasius mahakamensis sp. n. is described from the Mahakam River
(East Kalimantan, Indonesia) while Pangasius elongatus sp. n. is described from Thailand and Vietnam. These new species
which belong to the subgenus Pangasius (Pangasius) are morphologically close to P. polyuranodon. P. mahakamensis
is recognised from the other species of this subgenus by the unique combination of the following characters: short
caudal peduncle (14.0-16.7 %SL); large eye (diameter: 22.8-29.4 %HL); short mandibulary barbel (its length: 19.6-45.8
%HL); and short predorsal length (30.1-32.7 %SL). Pangasius elongatus is characterised by the unique combination of
the following characters: an elongated body with a moderate predorsal length (30.1-33.9 %SL), a short snout length (35.2-
42.8 %HL), a long caudal peduncle (17.6-21.4 %SL), short mandibular barbels (length: 10.4-39.3 %HL) and large eyes
(19.2-25.5 %HL). The results also show that Pangasius polyuranodon sensu stricto only consists of populations from
Sumatra, Central and West Kalimantan (Indonesia) and Sarawak (Malaysia). A new diagnosis is given for this species.
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