A new species of Akysis catfish has been described from Sumatra in a recent issue of the journal Zootaxa.
The species, which comes from the Batang Hari drainage in central Sumatra, was named Akysis fontaneus by Heok Hee Ng.
Akysis fontaneus can be distinguished from congeners in having a combination of: weakly emarginate caudal fin, convex dorsal surface of neurocranium making predorsal profile appear steeply sloping, four large serrations on the posterior edge of the pectoral spine that are more than half the width of the spine, and proportional measurements of the predorsal length, pectoral-fin length, length of adipose-fin base and interorbital distance.
Akysis fontaneus is known only from its type locality, a spring-fed stream (hence its name, from the Latin for spring) with a substrate of clay and highly degraded woody plant debris; the water was clear, with pH of 6.8.
For more information, see the paper: Ng, HH (2009) Akysis fontaneus, a new species of catfish (Siluriformes: Akysidae) from Sumatra. Zootaxa 1973, pp. 41"50.