| Glass knifefishes Fossil range: Upper Miocene - Recent |
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 Eigenmannia lineata
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Glass knifefishes are fishes in the family Sternopygidae in the order Gymnotiformes. The Miocene is a geological epoch of the Neogene period and extends from about 23 Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates The Actinopterygii (the plural form of Actinopterygius) comprise the class of the ray-finned fishes. The Gymnotiformes is a lineage of Ostariophysan Teleost Electric fishes Common names found in the literature include the Neotropical electric The Gymnotiformes is a lineage of Ostariophysan Teleost Electric fishes Common names found in the literature include the Neotropical electric The Gymnotiformes is a lineage of Ostariophysan Teleost Electric fishes Common names found in the literature include the Neotropical electric A genus (plural genera from Γένος Latin genus "descent family type gender" is a low-level Taxonomic In Biology and Ecology, extinction is the cessation of existence of a Species or group of taxa. The Gymnotiformes is a lineage of Ostariophysan Teleost Electric fishes Common names found in the literature include the Neotropical electric Species are also known as rattail knifefishes. [1]
These fishes inhabit freshwater streams and rivers in Panama and South America. Freshwater is a word that refers to bodies of water such as Ponds lakes rivers and streams containing low concentrations of dissolved Salts and other Total dissolved Panama, officially the Republic of Panama (República de Panamá) is the southernmost country of Central America. South America is a Continent of the Americas, situated entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a [1] Many sternopygid species are specialized for life in the deep (>20 m) swiftly moving waters of large river channels, like that of the Amazon and its major tributares (Crampton et al. , 2004) . Sternopygus species inhabit both streams and rivers. [2]
Many species are highly compressed laterally and translucent in life. [2] These fish have villiform (brush-like) teeth on the upper and lower jaws. The snout is relatively short. The eyes are relatively large, with a diameter equal to or greater than the distance between nares. The anal fin originates at the isthmus (the strip of flesh on the ventral surface between the gill covers). The maximum length is 140 cm in Sternopygus macrurus.
Eigenmannia vicentespelea is the only cave-dwelling gymnotiform. Humboldtichthys kirschbaumi (formerly genus Ellisella) from Upper Miocene of Bolivia is the only fossil gymnotiform. The Miocene is a geological epoch of the Neogene period and extends from about 23 [1]
These fish have a tone-like electric organ discharge (EOD) that occurs monophasically. The electric organ is a muscular organ common to all Electric fish used for the purposes of creating an Electric field; a behavior used for navigation
Some of these species are aquarium fishes. An aquarium (plural aquariums or aquaria) is a Vivarium consisting of at least one transparent side in which Water -dwelling Plants
References
- Albert, J. S. 2003. Family Sternopygidae. Pp 493-497 in R. E. Reis, S. O. Kullander & C. J. Ferraris, Jr. (eds). Checklist of the Freshwater Fishes of South and Central America. Edipucrs, Porto Alegre, 735p.
- Crampton, W. G. R. , K. Hulen, and J. S. Albert. 2004. Sternopygus branco, a new species of Neotropical electric fish (Gymnotiformes: Sternopygidae) from the lowland Amazon basin, with descriptions of ecology and electric organ discharges. Copeia, 2004(2): 244-258.
- ^ a b c Nelson, Joseph, S. (2006). Fishes of the World. John Wiley & Sons, Inc. . ISBN 0471250317.
- ^ a b "Sternopygidae". FishBase. FishBase is a comprehensive Database of information about Fish. Ed. Rainer Froese and Daniel Pauly. Apr 2007 version. N. p. : FishBase, 2007.
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