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Black Ghost Knifefish 400.jpg
Black Ghost Knifefish (A. albifrons)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gymnotiformes
Family: Apteronotidae
Genus: Apteronotus
Lacépède, 1800
Type species
Gymnotus albifrons
Linnaeus, 1766

Apteronotus is a genus of weakly electric knifefish in the family Apteronotidae, distinguished by the presence of a tiny caudal fin. This genus is restricted to South America.


There are currently 27 recognized species in this genus: [1][2][3]


  1. ^ Froese, Rainer, and Daniel Pauly, eds. (2013). Species of Apteronotus in FishBase. April 2013 version.
  2. ^ a b de Santana, C.D. & Cox Fernandes, C. (2012): A New Species of Sexually Dimorphic Electric Knifefish from the Amazon Basin, Brazil (Gymnotiformes: Apteronotidae). Copeia, 2012 (2): 283-292.
  3. ^ a b c d e de Santana, C.D. & Vari, R.P. (2013): Brown ghost electric fishes of the Apteronotus leptorhynchus species-group (Ostariophysi, Gymnotiformes); monophyly, major clades, and revision. Zoological Journal of the Linnean Society, 168 (3): 564–596.
  4. ^ Triques, M.L. (2011): Apteronotus acidops, new species of long snouted electric fish (Teleostei: Gymnotiformes: Apteronotidae) from the upper rio Paraná basin in Brazil, with a key to the apteronotid species from the area. Vertebrate Zoology, 61 (3): 299–306.