Naked characin
| Naked characin | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | incertae sedis |
| Genus: | Gymnocharacinus Steindachner, 1903[2] |
| Species: | G. bergii
|
| Binomial name | |
| Gymnocharacinus bergii Steindachner, 1903[2]
| |
| Synonyms | |
|
Gymnocharacinus bergi | |
The naked characin (Gymnocharacinus bergii) is a species of freshwater ray-finned fish, a characin belonging to the suborder Characoidei. It is the only species in the genus Gymnocharacinus. This taxon has not been assigned to a particular family within the Characoidei and is considered to be incertae sedis, i.e. its taxonomic affinities are, as yet, unclear.[2] This taxon is the southernmost member of the family (together with some Cheirodon species from Chile) and it is endemic to the headwaters of a stream near Valcheta in northern Patagonia, Argentina, which flow from a thermal spring. It is endangered because of competition from the Uruguay tetra (Cheirodon interruptus) and predation from the rainbow trout (Oncorhynchus mykiss), both being invasive species within the naked tetra's restricted range.[1] The naked tetra attains a maximum total length of 7.5 cm (3.0 in). Adults have no scales.[3]
References
- ^ a b Cussac, V.; Quiroga, S.; Kacoliris, F.; et al. (2019). "Gymnocharacinus bergii". IUCN Red List of Threatened Species. 2019 e.T40695A119048712. doi:10.2305/IUCN.UK.2019-2.RLTS.T40695A119048712.en. Retrieved 14 November 2021.
- ^ a b c Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Gymnocharacinus". Catalog of Fishes. California Academy of Sciences. Retrieved 11 November 2025.
- ^ Froese, Rainer; Pauly, Daniel (eds.). "Gymnocharacinus bergii". FishBase. April 2025 version.