- Animals
- ›Chordates
- ›Vertebrates
- ›Ray-finned Fishes
- ›Carps, Characins, Catfishes and Allies
- ›Characins
- ›Characoidei
- ›American tetras
- ›Gymnocharacinus
naked Characin
Gymnocharacinus bergii
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. 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. The naked tetra attains a maximum total length of 7.5 cm (3.0 in). Adults have no scales.
== References ==
Where it lives
Recorded sightings
—
geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Gymnocharacinus bergii in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 101889.