Article · Wikipedia archive · Last revised Jul 1, 2026

Brachychalcinus orbicularis

Brachychalcinus orbicularis, the discus tetra, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. The discus tetra is found in South America in the Amazon and Orinoco basins, and the coastal rivers of the Guianas, being recorded from Bolivia, Brazil, Colombia, French Guiana, Guyana, Peru, Suriname and Venezuela. This species has a maximum standard length of 9 cm (3.5 in).

Last revised
Jul 1, 2026
Read time
≈ 1 min
Length
179 w
Citations
6
Source
Wikipedia ↗
Brachychalcinus orbicularis
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Acestrorhamphidae
Genus: Brachychalcinus
Species:
B. orbicularis
Binomial name
Brachychalcinus orbicularis
Synonyms2
  • Tetragonopterus orbicularis Valenciennes, 1850
  • Poptella orbicularis (Valenciennes, 1850)
  • Ephippicharax orbicularis (Valenciennes, 1850)
  • Brachychalcinus guianensis Boeseman, 1952

Brachychalcinus orbicularis, the discus tetra, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins.2 The discus tetra is found in South America in the Amazon and Orinoco basins, and the coastal rivers of the Guianas, being recorded from Bolivia, Brazil, Colombia, French Guiana, Guyana, Peru, Suriname and Venezuela.1 This species has a maximum standard length of 9 cm (3.5 in).3

References

References

  1. Taphorn, D.C.; DoNascimiento, CD; Mojica, J.I.; Villa-Navarro, F. & Usma, S (2021). "Brachychalcinus orbicularis". IUCN Red List of Threatened Species. 2021 e.T175960637A175960674. doi:10.2305/IUCN.UK.2021-2.RLTS.T175960637A175960674.en. Retrieved 22 October 2025.
  2. Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Brachychalcinus". Catalog of Fishes. California Academy of Sciences. Retrieved 22 October 2025.
  3. Froese, Rainer; Pauly, Daniel (eds.). "Brachychalcinus orbicularis". FishBase. April 2025 version.