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Distribution of Betta Rutilans
The species has been collected from localities connected with the rivers Mempawah and Kepayang close to the town of Anjungan in Kalimantan Barat (West Kalimantan) province, Borneo, Indonesia.
Type locality is ‘Sungei Kepayang, 7 kilometers southeast of Anjungan on road to Pontianak, 0°20’N, 109°08’E, Kalimantan Barat, Borneo’.
Habitat of Betta Rutilans
A stenotypic inhabitant of peat swamp forests and associated black water streams.
The dense canopy of branches above means very little light penetrates the surface of such environments, and riparian vegetation also tends to grow thickly.
The water is typically stained darkly with humic acids and other chemicals released by decaying organic material.
The dissolved mineral content is generally negligible and pH can be as low as 3.0 or 4.0.
The substrate is usually covered by fallen leaves, branches and submerged tree roots and at certain times of year the fish may be forced to survive within the moist leaf litter for several weeks as permanent water is not always available.