| Scleromystax | |
|---|---|
| |
| Scleromystax barbatus | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Callichthyidae |
| Subfamily: | Corydoradinae |
| Genus: | Scleromystax Günther, 1864 |
| Type species | |
| Callichthys barbatus Quoy & Gaimard, 1824
| |
Scleromystax is a genus of fish in the family Callichthyidae endemic to small tributaries from several coastal river basins draining the southern and southeastern regions in Brazil.[1] Most of the species of Scleromystax are highly sexually dimorphic; males have developed odontodes inserted in fleshy papillae on the preopercular-opercular region and the dorsal and pectoral fins are 2–3 times as long as those of females.[1] S. salmacis is an exception, as its sexually dimorphic features are subtle and non-remarkable.