New Clarias

[Silurus]

Sudarto, GG Teugels & L Pouyaud, 2003. Description of two new Clarias species from Borneo (Siluriformes, Clariidae). Cybium 27: 153-161.

Abstract:
Clarias pseudoleiacanthus sp. nov. is described from Borneo (Kalimantan, Indonesia). The new species is distinguished from all other Southeast Asian Clarias species by the combination of the following characters: a short distance between the occipital process and the base of the first dorsal fin ray (4.5-5.6% SL), a very short occipital process with a broad and rounded tip (length: 5.7-8.0% HL), the anterior edge of the pectoral spine smooth and without serrae, 17-19 gill rakers on the first branchial arch, and a relatively short anal fin compared to C. nieuhofii (48.4-54.4 vs. 59.7-66.8% SL) with 55-57 rays. Clarias kapuasensis sp.nov. is described from the upper part of the River Kapuas (Western Kalimantan, Borneo, Indonesia). The new species is distinguished from all other Southeast Asian Clarias species by the combination of the following characters: a very short occipital process with a broad and rounded tip (length: 5.2-6.6% HL), a relatively long distance between the tip of the occipital process and the dorsal fin origin (6.4-8.7% SL), the anterior edge of the pectoral spine smooth and without serrae, 21-22 gill rakers on the first branchial arch, and a relatively short anal fin compared to C. nieuhofii (48.7-53.1 vs. 59.7-66.8% SL) with 51-60 rays.