''Liobagrus chenghaiensis'' is a species of

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

in the family

Amblycipitidae The Amblycipitidae are a family of catfishes, commonly known as torrent catfishes. It includes three genus, genera, ''Amblyceps'', ''Liobagrus'', and ''Xiurenbagrus'', and about 36 species. Taxonomy The family Amblycipitidae is a monophyly, mono ...

(the torrent catfishes)

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

, where it is only known from lake Chenghai in the province of

Yunnan Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is ...

. ''L. chenghaiensis'' is distinguished from all other species of ''Liobagrus'' with a serrated posterior margin of the pectoral-fin spine by possessing a free apex on the posterior margin of the adipose fin. It is similar to '' L. marginatus'' in the presence of a subtruncate

caudal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

, by which both are distinguished from all other Chinese congeners with a serrated posterior margin of the pectoral-fin spine. These two species are distinguished by differences in the body depth and the distance between the pelvic-fin insertion and the vent. Their distinction is also supported by osteological evidence.

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Liobagrus Freshwater fish of China Endemic fauna of Yunnan Fish described in 2013 {{catfish-stub