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Eigenmanniinae
Eigenmanniinae is a subfamily of freshwater ray-finned fishes belonging to the family Sternopygidae, the glass knifefishes. The fishes in this subfamily are found in the Neotropics as far north as Panama. Taxonomy Eigenmanniinae was first proposed as a subfamily in 1978 by the Venezeulan ichthyologist Francisco Mago Leccia. The validity of this taxon has been regarded as debateable and the 5th edition of ''Fishes of the World'' note that it had not been widely accepted. However, the monophyly of this clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ... has been supported by more recent morphological amd molecular analyses. Genera Eigenmanniinae contains the following genera: References {{Reflist Sternopygidae Taxa named by Francisco Mago Leccia Ray-finned fish subfam ...
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Glass Knifefish
Glass knifefishes are fishes in the family Sternopygidae in the order Gymnotiformes. Species are also known as rattail knifefishes. These fishes inhabit freshwater streams and rivers in Panama and South America. Many species are specialized for life in the deep (more than ) swiftly moving waters of large river channels, like that of the Amazon and its major tributaries where they have been observed swimming vertically. '' Sternopygus'' species inhabit both streams and rivers. Many species are highly compressed laterally and translucent in life. 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 in '' Sternopygus macrurus''. '' Eigenmannia vicentespelaea'' is the only cave-dwelling gymnotiform. '' ...
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Eigenmannia Virescens
''Eigenmannia virescens'', the glass knifefish, is a weakly electric freshwater fish found across South America. It is marketed as an aquarium fish. Description The appendix on the body has black lines running through the bottom of the sides, with the most intense line running on the anal fin. Like all members of its order, it is distinguished by its ability to produce electric fields. This is achieved by discharging an electric organ in the tail. Distribution This species is widely distributed in the rivers of South America. Their range extends from the Magdalena River basin in Colombia to the Rio de La Plata in Argentina, including Peru, Bolivia, Paraguay, Uruguay, Brazil, Venezuela, Guyana, and Suriname. See also * Feature detection (nervous system), Feature detection References External links * Aquatic Community: Glass Knife Fish - ''Eigenmannia virescens''
{{Authority control Eigenmannia, virescens Freshwater fish of Argentina Fish of Bolivia Knifefis ...
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