The bagrid catfish genus Olyra is known from the Ganges-Brahmaputra river system in the northern part of the Indian subcontinent. It is also known from localities southwards to the Manimalai River in southwestern India and eastwards to the Mae Klong River drainage in western Thailand. The genus is a supported monophyletic group diagnosed by the following combination of external characters: anguilliform body; unossified first and second dorsal-fin elements; and greatly enlarged upper caudal-fin lobe.
All Fishes Data Sheet
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