Oreoglanis tenuicauda is a species of catfish in the family Sisoridae, only known from the type locality in the upper reaches of the Nan River drainage, itself a tributary of the Chao Phraya River in northern Thailand, which was discovered by Vidthayanon, Saenjundaeng and H.H. Ng in 2009.Vidthayanon, C., P. Saenjundaeng and H.H. Ng, 2009. Eight new species of the torrent catfish genus Oreoglanis (Teleostei: Sisoridae) from Thailand. Ichthyol. Explor. Freshwat. 20(2):127-156.
Size This species reaches a length of .
Etymology The fish's name derives from tenuis, Latin for "thin" or "slender"; cauda (L.), "tail", referring to the more slender appearance of the caudal peduncle compared with its congeners in the Nan River drainage of Thailand.
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