Leiocassis

Leiocassis
Leiocassis bekantan
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Bagridae
Genus:	Leiocassis Bleeker, 1857
Type species
Bagrus micropogon Bleeker, 1852
Synonyms
Liocassis Günther, 1864(lapsus) LiocassusHerre, 1934(lapsus)

Leiocassis is a genus of bagrid catfishes found mostly in Southeast Asia with some species occurring in China.

The members of Leiocassis have an elongate narrow head and a prominently protruding snout. ^[1]

Species

This genus has a confused taxonomy and there is uncertainty surrounding the number of valid species. ^[1] Certain East Asian bagrids formerly placed in this genus have been moved to Tachysurus . In 2006, Heok Hee Ng considered the genus Leiocassis to be restricted to Sundaic Southeast Asia and Borneo and only a handful of species as valid (L. aculeata, L. collina, L. hosii, L. micropogon, L. poeciloptera, and L. tenebrica). ^[1]

There are currently 7 recognized species in this genus: ^[2]

• Leiocassis aculeata H. H. Ng & Hadiaty, 2005 ^[3]
• Leiocassis bekantan H. H. Ng & H. H. Tan, 2018 ^[4]
• Leiocassis collina H. H. Ng & K. K. P. Lim, 2006 ^[1]
• Leiocassis micropogon (Bleeker, 1852)
• Leiocassis poeciloptera (Valenciennes, 1840)
• Leiocassis rudicula H. H. Ng & Hadiaty, 2019
• Leiocassis tenebrica H. H. Ng & K. K. P. Lim, 2006 ^[1]

As of August 2025 ^[update] , both FishBase and WoRMS list 14 species. ^{[5] [6]}

References

1. Ng, Heok Hee; Lim, Kelvin K. P. (June 2006). "Two new species of Leiocassis (Teleostei: Bagridae), riverine catfishes from northeast Borneo". Ichthyol. Explor. Freshwaters. 17 (2): 165–172.
2. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Leiocassis". Catalog of Fishes . California Academy of Sciences . Retrieved 17 August 2025.
3. Ng, Heok Hee; Hadiaty, Renny K. (March 2005). "Two new bagrid catfishes (Teleostei: Bagridae) from the Alas River drainage, northern Sumatra". Ichthyol. Explor. Freshwaters. 16 (1): 83–92.
4. Ng, Heok Hee; Tan, Heok Hui. (October 2018). "Leiocassis bekantan (Teleostei: Bagridae), a new blackwater catfish from Borneo and Sumatra". Ichthyol. Explor. Freshwaters. 28 (4): 327–336.
5. Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Leiocassis". FishBase . August 2025 version.
6. Bailly, Nicolas (2014). "Leiocassis Bleeker, 1857". WoRMS. World Register of Marine Species . Retrieved 1 May 2025.