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Cybium,
Revue
Internationale dIchtyologie |
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Description of a new Clarias species from Southeast Asia based on morphological and genetical evidence (Siluriformes, Clariidae) Guy G. TEUGELS (1), SUDARTO (2) & Laurent POUYAUD (2, 3) (1) Musée
Royal de lAfrique Centrale, Laboratoire dIchtyologie, B-3080
Tervuren, and KU Leuven, Laboratory of Comparative Anatomy and Biodiversity,
B-3000 Leuven, BELGIUM. Abstract.
- Clarias intermedius n. sp. is described from Central Kalimantan
(Indonesia). The new species belongs to the group of Asian Clarias
species recognised by a very short distance between the occipital process
and the dorsal fin origin and including C. macrocephalus and C.
meladerma. From the former, it is distinguished amongst others by
fewer gill rakers on the first branchial arch (16-23 vs. 27-33);
from the latter is it easily recognised by the more numerous serrae on
the anterior side of the pectoral spine (26-46 vs. 14-22). Clarias
meladerma and the new species are sympatric in Central Kalimantan.
In this area, the existence of diagnostic enzymatic loci and the absence
of intermediate genotypes between both species demonstrated their reproductive
isolation. Key-words. - Clariidae - Clarias intermedius - Indonesia - New species - Taxonomy. |
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