Cetopangasius

Cetopangasius chaetobranchus is an extinct species of shark catfish, family Pangasiidae. The fossils of this fish originated from a Miocene lake fauna from what is now the Phetchabun Province of Thailand.

==Discovery== The fossils of Cetopangasius chaetobranchus were discovered alongside a number of other fish fossils; during the dry season of 1997, the villagers of Ban Nong Pia were excavating an irrigation reservoir with an area of and a uniform depth of . This effort inadvertently uncovered "thousands" of fossils, of fish, leaves from broad-leafed vascular plants, and reportedly remains of turtles and aquatic plants, some of which were sold to passers-by. The news of this discovery reached the press, and from May to June 1997, personnel from the Department of Mineral Resources and the National Center for Science Education visited the site for excavation. Further finds were not made as the reservoir filled in during the subsequent wet season of that year.