 Certain East Asian bagrids formerly placed in this genus have been moved to "Pseudobagrus".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. 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.