''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and

subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...

South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Electric Glass Knifefishes of the ''Eigenmannia trilineata'' species-group (Gymnotiformes: Sternopygidae): monophyly and description of seven new species. ''Zoological Journal of the Linnean Society, 175 (2): 384–414.'' They are typically found in slow-flowing streams, along the edge of large rivers, in deep river channels and in floodplains, and the genus also includes ''E. vicentespelaea'', the only cave-adapted knifefish. ''Eigenmannia'' are often found near submerged roots, aquatic plants and floating meadows. Depending on the exact species, they have a maximum total length of . They are

nocturnal Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed sens ...

, and feed on small invertebrates such as aquatic insect larvae and zooplanktonic crustaceans.

Species

These are the currently recognized species in this genus: * ''

Eigenmannia antonioi ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Ele ...

'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * ''

Eigenmannia besouro ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Ele ...

'' L. A. W. Peixoto & Wosiacki, 2016Peixoto, L.A.W. & Wosiacki, W.B. (2016): ''Eigenmannia besouro'', a new species of the ''Eigenmannia trilineata'' species-group (Gymnotiformes: Sternopygidae) from the rio São Francisco basin, northeastern Brazil. ''Zootaxa, 4126 (2): 262–270.'' * ''

Eigenmannia bumba ''Eigenmannia bumba'' is a species of glass knifefish from the rio Mearim basin in the northeast of Brazil. Guilherme Moreira Dutra, Telton Pedro Anselmo Ramos and Naércio Aquino Menezes. 2022. Description of Three New Species of Eigenmannia (G ...

'' Dutra, Ramos & Menezes, 2022 Guilherme Moreira Dutra, Telton Pedro Anselmo Ramos and Naércio Aquino Menezes. 2022. Description of Three New Species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil. Neotrop Ichthyol. 20(1);e210117. DOI: 10.1590/1982-0224-2021-0117 * ''

Eigenmannia cacuria ''Eigenmannia cacuria'' is a species of glass knifefish from the upper rio Parnaíba in the northeast of Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South Amer ...

'' Dutra, Ramos & Menezes, 2022 * ''

Eigenmannia correntes ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Ele ...

'' Campos-da-Paz & Queiroz, 2017Campos-Da-Paz, R. & Queiroz, I.R. (2017): A new species of ''Eigenmannia'' Jordan and Evermann (Gymnotiformes: Sternopygidae) from the upper rio Paraguai basin. ''Zootaxa, 4216 (1): 73-84.'' * ''

Eigenmannia desantanai ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Ele ...

'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * ''

Eigenmannia dutrai ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The Ele ...

'' L. A. W. Peixoto, M. N. L. PASTANA, & Ballen, 2020 * ''

Eigenmannia goajira ''Eigenmannia goajira'' is a species of glass knifefish found in the Lake Maracaibo basin in Colombia and Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is ...

'' L. P. Schultz, 1949Dutra, G.M., Santana, C.D.d., Vari, R.P. & Wosiacki, W.B. (2014)
The South American Electric Glass Knifefish Genus ''Distocyclus'' (Gymnotiformes: Sternopygidae): Redefinition and Revision.
''Copeia, 2014 (2): 345-354.'' * ''

Eigenmannia guairaca ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The ...

'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * '' Eigenmannia humboldtii'' (

Steindachner Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner describ ...

, 1878) * '' Eigenmannia limbata'' (

Schreiner Schreiner is a family name of German origin. Origin ''Schreiner'' is an occupational surname and refers to a woodworker and often more specifically to a maker of fine woodwork; thus it translates to English as "joiner", "cabinetmaker", or ( ...

& A. Miranda-Ribeiro, 1903) * '' Eigenmannia loretana'' Waltz & Albert, 2018 * '' Eigenmannia macrops'' (

Boulenger Boulenger is a surname. Notable people with the surname include: * Benjamin Boulenger (born 1990), French footballer * Edward George Boulenger (1888–1946), British zoologist, director of aquarium at London Zoo * George Albert Boulenger (1858–1 ...

, 1897) * ''

Eigenmannia matintapereira ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The ...

'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * ''

Eigenmannia meeki ''Eigenmannia'' is a genus of fish in the family Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the Río de la Plata Basin), and Panama.Peixoto, L.A.W., Dutra, G.M. & Wosiacki, W.B. (2015). The ...

'' Dutra, de Santana & Wosiacki, 2017 * '' Eigenmannia microstoma'' ( J. T. Reinhardt, 1852) * '' Eigenmannia muirapinima'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * '' Eigenmannia nigra'' Mago-Leccia, 1994 * '' Eigenmannia oradens'' Dutra, L. A. W. Peixoto, de Santana & Wosiacki, 2018 * '' Eigenmannia pavulagem'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * '' Eigenmannia robsoni'' Dutra, Ramos & Menezes, 2022 Guilherme Moreira Dutra, Telton Pedro Anselmo Ramos and Naércio Aquino Menezes. 2022. Description of Three New Species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil. Neotrop Ichthyol. 20(1);e210117. DOI: 10.1590/1982-0224-2021-0117 * '' Eigenmannia sayona'' L. A. W. Peixoto & Waltz, 2017Peixoto, L. & Waltz, B.T. (2017): A new species of the Eigenmannia trilineata species group from the río Orinoco basin, Venezuela (Gymnotiformes: Sternopygidae). ''Neotropical Ichthyology 15(1): 150-199.'' * '' Eigenmannia sirius'' L. A. W. Peixoto & Waltz, 2019 * '' Eigenmannia trilineata'' R. B. López & Castello, 1966 * ''

Eigenmannia vicentespelaea ''Eigenmannia vicentespelaea'' is a species of weakly electric knifefish in the family Sternopygidae. Native to the São Domingos karst area in central Brazil, it is the only known knifefish to exclusively inhabit caves. Measuring up to lo ...

'' Triques, 1996 * ''

Eigenmannia virescens The glass knifefish (''Eigenmannia virescens'') 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, ...

'' ( Valenciennes, 1836) * '' Eigenmannia waiwai'' L. A. W. Peixoto, Dutra & Wosiacki, 2015

References

{{Taxonbar, from=Q3049353 Freshwater fish genera Sternopygidae Taxa named by David Starr Jordan Taxa named by Barton Warren Evermann