Description of two new Clarias species from Borneo (Siluriformes, Clariidae)

Sudarto , Teugels G.G., Pouyaud L.

Published date: April 2003
Volume: 27
Number: 2
Pagination: 153-161
Publisher: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/2004-272-008
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.

Keywords: Borneo - Clarias kapuasensis - Clarias pseudoleiacanthus - Clariidae - Indonesia - Morphology - New species - Taxonomy
PDF available for everyone