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Symphysodon tarzoo

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Species of fish

Green discus
Individuals from Nanay (above) and Japurá Rivers (below)
Conservation status

Least Concern  (IUCN 3.1)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Genus: Symphysodon
Species: S. tarzoo
Binomial name
Symphysodon tarzoo
Lyons, 1959

Symphysodon tarzoo, the green discus, is a species of cichlid endemic to Brazil; specifically, to rivers of the western Amazon Basin upriver from the Purus arch, although it occasionally occurs downstream. An introduced population in the Nanay River is based on stock from the Tefé region. The green discus is found in blackwater habitats with a high temperature of 27–30 °C (81–86 °F) and low pH of 4.8–5.9. Although also known from whitewater, its preference for lentic habitats such as floodplains means that the water contain little suspended material (unlike main sections of whitewater rivers).

This species grows to a length of 13.2 centimetres (5.2 in) SL. S. tarzoo has red spots on the anal fin and body, which separates it from other discus species.

The scientific name was coined by Earl Lyons in 1959, and the species was revalidated by pattern, morphology and mtDNA in 2006. Later studies have confirmed its distinction, although some suggest the correct scientific name for the green discus is S. aequifasciatus (a name typically used for the blue/brown discus). No natural (wild) hybrids are known between the green discus and its relatives.

References

  1. Frederico, R.G. (2023). "Symphysodon tarzoo". IUCN Red List of Threatened Species. 2023: e.T164494878A164494888. doi:10.2305/IUCN.UK.2023-1.RLTS.T164494878A164494888.en. Retrieved 5 July 2024.
  2. ^ Ready, J.S.; Ferreira, E.J.G.; Kullander, S.O. (2006). "Discus fishes: mitochondrial DNA evidence for a phylogeographic barrier in the Amazonian genus Symphysodon (Teleostei: Cichlidae)". Fish Biology. 69: 200–211. Bibcode:2006JFBio..69S.200R. doi:10.1111/j.1095-8649.2006.01232.x.
  3. ^ Amado, M.V.; Farias, I.P.; Hrbek, T. (2011). "A Molecular Perspective on Systematics, Taxonomy and Classification Amazonian Discus Fishes of the Genus Symphysodon". International Journal of Evolutionary Biology. 2011: 360654. doi:10.4061/2011/360654. PMC 3147135. PMID 21811676.
  4. ^ Bleher, H.; Stölting, K.N.; Salzburger, W.; Meyer, A. (2007). "Revision of the genus Symphysodon Heckel, 1840 (Teleostei: Perciformes: Cichlidae) based on molecular and morphological characters". Aqua. 12: 133–174.
  5. Crampton (2008). "Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)". Neotrop. Ichthyol. 6 (4): 599–612. doi:10.1590/S1679-62252008000400008.
  6. Froese, Rainer; Pauly, Daniel (eds.). "Symphysodon tarzoo". FishBase. January 2017 version.
  7. ^ "New Discus named Symphysodon tarzoo". Matt Clarke. practical fishkeeping. 2006-11-28. Archived from the original on March 7, 2009. Retrieved 15 August 2009.
Taxon identifiers
Symphysodon tarzoo


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