Rhamphichthys

Rhamphichthys is a genus of South American sand knifefishes found in the Amazon, Orinoco, Río de la Plata and Paranaíba basins, as well as rivers in the Guianas.[1] They are found along vegetated edges or near the bottom of rivers;[1] they are often quite common in deep river channels.[2] Rhamphichthys feed on small invertebrates. Little else is known about their behavior, but observations in aquariums indicate that they are nocturnal.[1] They have a relatively long slender snout and depending on the exact species reach up to 26.5–100 cm (0.9–3.3 ft) in total length.[1][3]

Rhamphichthys
Rhamphichthys marmoratus
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
Order:
Gymnotiformes
Family:
Rhamphichthyidae
Genus:
Rhamphichthys

Species

There are currently 10 recognized species in this genus:[3]

  • Rhamphichthys apurensis Fernández-Yépez, 1968
  • Rhamphichthys atlanticus Triques, 1999
  • Rhamphichthys drepanium Triques, 1999
  • Rhamphichthys hahni Meinken, 1937
  • Rhamphichthys heleios T. P. Carvalho & J. S. Albert, 2015[2]
  • Rhamphichthys lineatus Castelnau, 1855
  • Rhamphichthys longior Triques, 1999
  • Rhamphichthys marmoratus Castelnau, 1855
  • Rhamphichthys pantherinus Castelnau, 1855
  • Rhamphichthys rostratus Linnaeus, 1766
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References
  1. van der Sleen, P.; J.S. Albert, eds. (2017). Field Guide to the Fishes of the Amazon, Orinoco, and Guianas. Princeton University Press. p. 340. ISBN 978-0691170749.
  2. Carvalho, T.P. & Albert, J.S. (2015): A New Species of Rhamphichthys (Gymnotiformes: Rhamphichthyidae) from the Amazon Basin. Copeia, 103 (1): 34-41.
  3. Froese, Rainer and Pauly, Daniel, eds. (2017). Species of Rhamphichthys in FishBase. December 2017 version.


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