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Scleromystax

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Genus of fishes

Scleromystax
Scleromystax barbatus
Scientific classification Edit this 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. 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. S. salmacis is an exception, as its sexually dimorphic features are subtle and non-remarkable.

Taxonomy

The species of Scleromystax were previously classified within the genus Corydoras. However, Scleromystax species are now thought to be more closely related to Aspidoras in a tribe called Aspidoradini. Although the monophyly of Scleromystax has been demonstrated, phylogenetic relationships of its species remains obscure. In addition, the taxonomic status of its species are only partially resolved.

Species

There are currently 5 recognized species in this genus:

References

  1. ^ Britto, M.R. & Reis, R.E. (2005): A new Scleromystax species (Siluriformes: Callichthyidae) from coastal rivers of Southern Brazil. Neotropical Ichthyology, 3 (4): 481–488.
  2. Britto, M.R. (2003): Phylogeny of the subfamily Corydoradinae Hoedeman, 1952 (Siluriformes: Callichthyidae), with a definition of its genera. Archived 2007-09-28 at the Wayback Machine Proceedings of the Academy of Natural Sciences of Philadelphia, 153 (1): 119–154.
  3. Britto, M.R., Fukakusa, C.K. & Malabarba, L.R. (2016): New species of Scleromystax Günther, 1864 (Siluriformes: Callichthyidae) - extending the meridional distribution of genera endemic to the Atlantic Forest. Neotropical Ichthyology, 14 (3): e150158.
Taxon identifiers
Scleromystax
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