''Leiocassis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

bagrid catfish The Bagridae are a family of catfish that are native to Africa (''Bagrus'') and Asia (all other genera) from Japan to Borneo. It includes about 245 species. These fish are commonly known as naked catfishes or bagrid catfishes. Many large bagrid ...

es found mostly in

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...

with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

. Certain

East Asia East Asia is the eastern region of Asia, which is defined in both geographical and ethno-cultural terms. The modern states of East Asia include China, Japan, Mongolia, North Korea, South Korea, and Taiwan. China, North Korea, South Korea ...

n bagrids formerly placed in this genus have been moved to ''

Pseudobagrus ''Pseudobagrus'' is a genus of bagrid catfishes that inhabit streams and rivers throughout East Asia. About half of these species occur in China. The two ''Coreobagrus'' species, ''C. brevicorpus'' and ''C. ichikiwai'', are both treated in so ...

''. In 2006,

Heok Hee Ng Heok Hee Ng is a Singaporean ichthyologist and researcher of biodiversity at the Lee Kong Chian Natural History Museum of the National University of Singapore. He specialises in Asian catfish systematics with particular focus on sisoroid catf ...

considered the genus ''Leiocassis'' to be restricted to

Sundaic Sundaland (also called Sundaica or the Sundaic region) is a biogeographical region of South-eastern Asia corresponding to a larger landmass that was exposed throughout the last 2.6 million years during periods when sea levels were lower. It ...

and

Borneo Borneo (; id, Kalimantan) is the List of islands by area, third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java Isl ...

and only a handful of species as valid (''L. aculeatus'', ''L. collinus'', ''L. hosii'', ''L. micropogon'', ''L. poecilopterus'', and ''L. tenebricus''). The members of ''Leiocassis'' have an elongate narrow head and a prominently protruding snout.

Species

There are currently 14 recognized species in this genus: * ''

Leiocassis aculeatus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' H. H. Ng & Hadiaty, 2005 * ''

Leiocassis bekantan ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' H. H. Ng & H. H. Tan, 2018 * ''

Leiocassis brevirostris ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' V. H. Nguyễn, 2005 * ''

Leiocassis collinus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' H. H. Ng & K. K. P. Lim, 2006 * ''

Leiocassis crassirostris ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

Regan The family name Regan, along with its cognates O'Regan, O Regan, Reagan, and O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to have originated in ancient Gaelic ''ri' ...

, 1913 * ''

Leiocassis doriae ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

, 1913 * ''

Leiocassis hosii ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

, 1906 * ''

Leiocassis longibarbus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' G. H. Cui, 1990 * ''

Leiocassis micropogon ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' (

Bleeker Bleeker is a Dutch occupational surname. Bleeker is an old spelling of ''(linnen)bleker'' ("linen bleacher").Leiocassis nitidus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' (Sauvage & Dabryi, 1874) * ''

Leiocassis poecilopterus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids f ...

'' (

Valenciennes Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced a ...

, 1840) * ''

Leiocassis saravacensis ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagrids fo ...

Boulenger Boulenger is a surname. Notable people with the surname include: * Benjamin Boulenger (born 1990), French footballer * Edward George Boulenger (1888–1946), British zoologist, director of aquarium at London Zoo * George Albert Boulenger (1858� ...

, 1894 * ''

Leiocassis tenebricus ''Leiocassis'' is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China. This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. Certain East Asian bagri ...

'' H. H. Ng & K. K. P. Lim, 2006 * '' Leiocassis yeni'' V. H. Nguyễn & H. D. Nguyễn, 2005

References

Bagridae Fish of Asia Catfish genera Freshwater fish genera Taxa named by Pieter Bleeker {{bagridae-stub