Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Otomorpha
Subcohors: Ostariophysi
Sectio: Otophysa
Ordo: Characiformes
Familia: Serrasalmidae
Genus: Piaractus
Species: P. brachypomus – P. mesopotamicus
Name
Piaractus Eigenmann, 1903
Type species: Myletes brachypomus Cuvier, 1818
Etymology: From piar (= fat), and actinos (= ray), referring to rayed adipose fin. From: The ETYFish Project
Synonyms
Reganina Fowler, 1907
Waiteina (subgenus of Colossoma) Fowler, 1907
References
Piaractus and its species (including synonyms) in Catalog of Fishes, Eschmeyer, W.N., Fricke, R. & van der Laan, R. (eds.) 2024. Catalog of Fishes electronic version.
Piaractus species list in FishBase,
Froese, R. & Pauly, D. (eds.) 2024. FishBase. World Wide Web electronic publication, www.fishbase.org, version 02/2024.
Piaractus – Taxon details on Integrated Taxonomic Information System (ITIS).
Piaractus is a genus of large serrasalmid from South America.[1] The two traditionally recognized species of Piaractus are very similar in appearance and were formerly included in the genus Colossoma, which currently only contains another similar species, the tambaqui (Colossoma macropomum).[2][3] A third Piaractus was described in 2019 as a new species, but it was formerly considered a subpopulation of P. brachypomus.[4]
Species
There are currently three recognized species in this genus:[1][4][5]
Piaractus brachypomus (G. Cuvier, 1818) (Pirapatinga or red-bellied pacu)
Piaractus mesopotamicus (Holmberg, 1887) (small-scaled pacu or Paraná River pacu)
Piaractus orinoquensis Escobar et al., 2019
References
Froese, Rainer and Pauly, Daniel, eds. (2013). Species of Piaractus in FishBase. April 2013 version.
OPEFE (27 December 2011). genus Piaractus. Retrieved 2 March 2017.
Nico, L.; P. Fuller; and M. Neilson (22 October 2013). Piaractus brachypomus. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. Retrieved 2 March 2017.
Escobar, M.D., R.P. Ota, A. Machado-Allison, I.P. Farias and T. Hrbek (2019). A new species of Piaractus (Characiformes: Serrasalmidae) from the Orinoco Basin with a redescription of Piaractus brachypomus. Journal of Fish Biology: [1-x]. doi:10.1111/jfb.13990
Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Piaractus". Catalog of Fishes. California Academy of Sciences. Retrieved 5 July 2019.
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