Oreoglanis laciniosa is a species of catfish in the family Sisoridae, found in the Mae Sa Nga drainage, a tributary of the Salween River in western Thailand, which was discovered by Vidthayanon, Saenjundaeng and H.H. Ng in 2009.
This species reaches a length of .
The fish's name is Latin for "indented" or "jagged", referring to the lobulate posterior margin of the lower lip.