''Nematobrycon'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

characin Characiformes is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras.; Buckup P.A.: "Relationsh ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the Atrato and San Juan River basins in western

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

. The two described species in this genus are very popular

aquarium An aquarium (: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. fishkeeping, Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquati ...

fish.

Species

* '' Nematobrycon lacortei'' S. H. Weitzman & W. L. Fink, 1971 (rainbow tetra) * '' Nematobrycon palmeri'' C. H. Eigenmann, 1911 (emperor tetra)

References

* Rhoadsiini Taxa named by Carl H. Eigenmann Endemic fauna of Colombia Freshwater fish of Colombia Characiformes genera {{Characidae-stub