''Eigenmannia'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Sternopygidae (glass knifefishes) native to tropical and subtropical South America (south to the

Río de la Plata Basin The Río de la Plata basin ( es, Cuenca del Plata, pt, Bacia do Prata), more often called the River Plate basin in scholarly writings, sometimes called the Platine basin or Platine region, is the hydrographical area in South America that drain ...

), and

Panama Panama ( , ; es, link=no, Panamá ), officially the Republic of Panama ( es, República de Panamá), is a transcontinental country spanning the southern part of North America and the northern part of South America. It is bordered by Co ...

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

, and feed on small invertebrates such as aquatic insect larvae and

zooplankton Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by ...

ic crustaceans.

Species

These are the currently recognized species in this genus: * '' Eigenmannia antonioi'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * '' Eigenmannia besouro'' 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'' 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'' Dutra, Ramos & Menezes, 2022 * '' Eigenmannia correntes'' 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'' L. A. W. Peixoto, Dutra & Wosiacki, 2015 * '' Eigenmannia dutrai'' L. A. W. Peixoto, M. N. L. PASTANA, & Ballen, 2020 * '' Eigenmannia goajira'' 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 ''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 ...

'' ( Steindachner, 1878) * ''

Eigenmannia limbata ''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 ...

'' ( Schreiner & A. Miranda-Ribeiro, 1903) * ''

Eigenmannia loretana ''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 ...

'' Waltz & Albert, 2018 * ''

Eigenmannia macrops ''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 ...

'' ( Boulenger, 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 ''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 ...

'' ( J. T. Reinhardt, 1852) * ''

Eigenmannia muirapinima ''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 nigra ''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 ...

'' Mago-Leccia, 1994 * ''

Eigenmannia oradens ''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, L. A. W. Peixoto, de Santana & Wosiacki, 2018 * ''

Eigenmannia pavulagem ''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 robsoni ''Eigenmannia robsoni'' is a species of glass knifefish in the family Sternopygidae. It is found in the Parnaíba basin of north-eastern Brazil. Guilherme Moreira Dutra, Telton Pedro Anselmo Ramos and Naércio Aquino Menezes. 2022. Descriptio ...

'' 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 ''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 & 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 ''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 & Waltz, 2019 * ''

Eigenmannia trilineata ''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 ...

'' R. B. López & Castello, 1966 * ''

Eigenmannia vicentespelaea ''Eigenmannia vicentespelaea'' is a species of electric fish, weakly electric Gymnotiformes, knifefish in the family (biology), family Sternopygidae. Native to the São Domingos, Goiás, São Domingos karst area in central Brazil, it is the only ...

'' Triques, 1996 * '' Eigenmannia virescens'' (

Valenciennes Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced a ...

, 1836) * ''

Eigenmannia waiwai ''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

References

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