Brown leaf catfish (Silurichthys ligneolus) is a ray-finned fish of the family Siluridae. It inhabits freshwater waters. This species can reach a maximum total length of 5.5 cm. With a trophic level of 3.1, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Vulnerable on the IUCN Red List.
Dorsal soft rays (total): 2; Anal soft rays: 44 - 45; Vertebrae: 46 - 48. This species is distinguished from congeners in having the following set of characters: depth at anus 9.1-11.0% SL; caudal peduncle depth 4.7-5.5% SL; eye diameter 6.7-9.8% HL; pelvic fins present; anal-fin rays 44-45; principal rays on the lower caudal-fin lobe 3-4, lower lobe of caudal fin indistinct; vertebrae 46-48; one gill raker on the first branchial arch; body uniformly brown. Based on the morphology of its caudal fin, this species is hypothesized to be the sister taxon of S. sanguineus.: elongated.
Behavioural data for Brown leaf catfish is currently being reviewed.
Freshwater; benthopelagic. Tropical
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