Apteronotus magdalenensis
| Apteronotus magdalenensis | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | Gymnotiformes |
| Family: | Apteronotidae |
| Genus: | Apteronotus |
| Species: | A. magdalenensis |
| Binomial name | |
| Apteronotus magdalenensis (Miles, 1945)[1] | |
| Synonyms[2] | |
|
Ubidia magdalenensis Miles, 1945 (basionym) | |
Apteronotus magdalenensis is a species of ghost knifefish (Apteronotidae) endemic to Colombia.[3] The species was initially placed in the newly described genus Ubidia, of which it was the type species,[1] but was subsequently moved to Apteronotus.[2]
Though often reported to be 1.3 m (4 ft 3 in) long (specifically, 1,294 mm (50.9 in) long),[3][4] this appears to stem from a misidentification of Sternopygus aequilabiatus; A. magdalenensis is actually much smaller, commonly around 30 cm (12 in) in total length, and the largest male specimens being 449 mm (17.7 in) long.[5][6]
The species is only found in the Rio Magdalena-Cauca basin, inhabiting river stretches with sandy to rocky substrate and turbidity from heavy sediment load.[5][7] Like all gymnotiformes, this species is an electric fish; they produce a continuous-wave electric organ discharge (EOD) that are used to detect their prey, being the larvae of aquatic insects.[5]
References
- 1 2 Miles, Cecil (1945). "Some Newly Recorded Fishes from the Magdalena River System". Ictiologia. Retrieved 29 April 2026.
- 1 2 Bailly N (ed.). "Apteronotus magdalenensis (Miles, 1945)". FishBase. World Register of Marine Species. Retrieved 2026-04-29.
- 1 2 "Apteronotus magdalenensis (Miles, 1945)". FishBase.
- ↑ hecklist of the Freshwater Fishes of South and Central America (PDF). Porto Alegre: Edipucrs. 2003. pp. 503–508. Retrieved 29 April 2026.
- 1 2 3 Maldonado-Ocampo, J.A.; Santana, C.D. de; W.G.R. Crampton (2011). "On Apteronotus magdalenensis (Miles, 1945) (Gymnotiformes: Apteronotidae): a poorly known species endemic to the río Magdalena basin, Colombia". Neotrop. Ichthyol. 9 (3): 505–514. doi:10.1590/S1679-62252011000300005.
- ↑ van der Sleen, P.; J.S. Albert, eds. (2017). Field Guide to the Fishes of the Amazon, Orinoco, and Guianas. Princeton University Press. pp. 322–326. ISBN 978-0691170749.
- ↑ "Fish, Gymnotiformes, Apteronotidae, Apteronotus magdalenensis (Miles, 1945): Distribution extension of an endangered endemic knifefish, in northern Colombia" (PDF). Checklist. 2009. ISSN 1809-127X. Retrieved 29 April 2026.