Fish fauna in tributaries of the Suiá-Miçú River (upper Xingu river basin), in the Cerrado-Amazon transition zone, eastern state of Mato Grosso, Brazil by Luciano Lima, Aline Santos, Dilermando Lima Junior

“…Characiformes was the most species-rich order, with 19 species, followed by Siluriformes, Gymnotiformes and Perciformes, with four species each.…”
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Fish fauna of headwater streams that cross the Atlantic Forest of south São Paulo state by Mauricio Cetra, Walter Barrella, Francisco Neto, Abílio Martins, Bruno Mello, Rodrigo Almeida

“…The previous list of fish for the Sorocaba river basin increased with the addition of seven species of Characiformes, one Gymnotiformes and four Siluriformes.…”
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Assessment of fish assemblage in an urban system, Itapecerica River, upper São Francisco River basin, Divinópolis, Minas Gerais, Brazil by Fabrício Domingos, Ralph Thomé, Rosy Ribeiro, Helena Souza, Hélio Santos

“…Characiformes were represented by 16 species, Siluriformes by nine, Gymnotiformes and Perciformes by two each. Three alien species and five migratory fish were recorded. …”
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A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin by Horácio Ferreira Júlio Júnior, Claudenice Dei Tós, Ângelo Antonio Agostinho, Carla Simone Pavanelli

“…These species belong to six Orders, encompassing two of Myliobatiformes, six of Characiformes, 17 of Siluriformes, six of Gymnotiformes, one of Perciformes, and one of Pleuronectiformes. …”
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Fish from urban tributaries to the Vermelho River, upper Paraguay River Basin, Mato Grosso, Brazil by Valdeci Oliveira, Lucia Mateus, Simoni Loverde-Oliveira, William Pietro-Souza

“…A total of 56 species belonging to five orders, Characiformes, Siluriformes, Gymnotiformes, Cyprinodontiformes, and Perciformes, 21 families and 44 genera were sampled. …”
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The fish community of the Paredes floodplain lake, Magdalena medio (Santander) and its association with spacio-temporal and environmental variables by Beatriz H. Mojica-Figueroa, John Jairo Díaz-Olarte

“…Between february and december of 2011 the fish communities of the ciénaga de Paredes, were studied by four samples in periods contrasting climates, station 1, corresponding to the inlet of the pipe Peruétano (BCP), station 2, Swamp Center (CC) and station 3, the mouth of the creek Gómez (DQG).They were captured 762 individuals, the 67%, 28%, and 4% corresponded to the orders Characiformes, Siluriformes and Perciformes respectively, the remaining 1% corresponds to the orders of Gymnotiformes and Myliobatiformes. It was found 29 species, of which, Prochilodus magdalenae, Ageneiosus pardalis, Curimata mivartii, Ctenolucius hujeta, Cyphocharax magdalenae and Hoplias malabaricus were the most dominant (abundant and frequent). …”
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Inventario de la ictiofauna del Caño La Guardia, afluente del río Capanaparo (cuenca del Orinoco), estado Apure, Venezuela by Carmen G. Montaña, Craig A. Layman, Donald C. Taphorn

“…The orders of most importance were Characiformes (94 species), Siluriformes (34 species), Perciformes (24 species) and Gymnotiformes (12 species). Samples were collected from three types of habitat: sandy beaches, main river channel and sites associated with the morichito palm tree (Mauritiella aculeata). …”
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The fishes of National Forest of Caxiuanã (Melgaço and Portel municipality, Pará State - Brazil) by Luciano Fogaça de Assis Montag, Tiago Magalhães da Silva Freitas, Wolmar Benjamin Wosiacki, Ronaldo Borges Barthem

“…Among a total of 208 species collected, there was a predominance of Characiformes (81 species), followed by Siluriformes, Perciformes and Gymnotiformes with 46, 35and 25 species, respectively. …”
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The fish fauna of streams in the Madeira-Purus interfluvial region, Brazilian Amazon by Daniela de França Barros, Jansen Zuanon, Fernando Pereira de Mendonça, Helder Mateus Viana Espírito Santo, André Vieira Galuch, Ana Luisa Mangabeira Albernaz

“…Characiformes was the most diverse taxonomic group in the samples, followed by Gymnotiformes and Siluriformes. Our findings indicate that the fish fauna of streams in the Madeira- Purus interfluvial plain is both rich and diverse and should be considered during the implementation of strengthened environmental conservation strategies in this region.…”
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Ichthyofauna of the Ribeirão Taboão, Paraíba do Sul river basin, Mogi das Cruzes, SP by Marina Loeb, Ilana Fichberg, George Mattox

“…The most representative order was Characiformes, with six species, followed by Siluriformes with five species, Gymnotiformes with three species, Labriformes with two species, and Cyprinodontiformes and Synbranchiformes with a single species each. …”
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Checklist of the freshwater fishes of Colombia by Javier A. Maldonado-Ocampo, Richard P. Vari, José Saulo Usma

“…Orders with the largest numbers of species in the Colombian continental ichthyofauna are the Characiformes (637 species), Siluriformes (524 species), Perciformes (124 species), and Gymnotiformes (74 species), with the remaining 10 orders having from 1 to 35 species. …”
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Geographic range, distribution patterns and interactions of Monogenea Van Beneden 1858, with species of native host freshwater fishes from Brazil by Marcos Tavares-Dias, Luís Mauricio Abdon Silva, Marcos Sidney Brito Oliveira

“…We used 1,698 samples of 296 fish species of 28 families distributed into Characiformes, Siluriformes, Cichliformes, Gymnotiformes, Perciformes, Mugiliformes, Osteoglossiformes and Clupeiformes, in addition to four hybrid fish. …”
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Parasitism of Cichlasoma paranaense Kullander, 1983 and Gymnotus carapo Linnaeus, 1814 by Clinostomum complanatum (Rudolphi, 1814) Metacercariae in the Taquari river by A. T. Silva-Souza, G. Ludwig

“…Yellow spot disease was observed only in Gymnotus carapo Linnaeus, 1814 (Gymnotiformes, Gymnotidae) and Cichlasoma paranaense Kullander, 1983 (Perciformes, Cichlidae). …”
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Fish assemblage structure of the Ipanema River, a small lotic environment partially protected by a Conservation Unit in southeastern Brazil by AK Oliveira, F Apone, JLO Birindelli, JC Garavello

“…Local assemblage showed to be species rich, with fifty-two species belonging to Characiformes (25 spp.), Siluriformes (19 spp.), Cyprinodontiformes (3 spp.), Gymnotiformes (2 spp.), Perciformes (2 spp.), and Synbranchiformes (1 sp.). …”
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Estudio de los estados larvales de la ictiofauna en la zona de Puerto Nariño, Amazonia Colombiana, durante el período de aguas ascendentes (2003) by Mónica Andrea Gutiérrez Espinosa, Germán Gálvis

“…Se colectaron 6.492 larvas y juveniles de peces, correspondientes a cinco órdenes (Characiformes, Siluriformes, Perciformes, Clupeiformes y Gymnotiformes) y 15 familias. Se identificaron taxonómicamente y se describieron 56 morfoespecies de larvas de peces, de las cuales solo el 23,2% fueron a nivel específico, cifra alta si se tiene en cuenta la falta de información bibliográfica al respecto. …”
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Myxobolus freitasi n. sp. (Myxozoa: Bivalvulida), a parasite of the brain of the electric knifefish in the Brazilian Amazon region by José Ledamir Sindeaux-Neto, Michele Velasco, Diehgo Tuloza da Silva, Patrícia Matos, Marcelo Francisco da Silva, Evonnildo Costa Gonçalves, Edilson Matos

“…Abstract A total of 30 specimens of the Amazonian electric knifefish, Brachyhypopomus beebei Schultz, 1944 (Gymnotiformes: Hypopomidae), were collected from the Peixe-Boi River in the state of Pará, Brazil (1°06’59” S; 47°18’26” W). …”
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Peces de la estrella fluvial inírida: ríos Guaviare, Inírida, Atabapo y Orinoco (Orinoquía colombiana) by Carlos A. Lasso, José Saulo Usma Oviedo, Francisco Villa, María Teresa Sierra-Quintero, Armando Ortega-Lara, Lina María Mesa, Miguel Alejandro Patiño, Oscar M. Lasso-Alcalá, Mónica A. Morales-Betancourt, Katiusca González-Oropeza, María P. Quiceno, Arnaldo Ferrer Pérez, Cesar Freddy Suárez

“…Orders with the largest numbers of species in the Star were Characiformes (237 species), Siluriformes (136 species), Perciformes (60 species), and Gymnotiformes (19 species), with the remaining 6 orders having from 1 to 7 species. …”
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Fish geometry and electric organ discharge determine functional organization of the electrosensory epithelium. by Juan Ignacio Sanguinetti-Scheck, Eduardo Federico Pedraja, Esteban Cilleruelo, Adriana Migliaro, Pedro Aguilera, Angel Ariel Caputi, Ruben Budelli

“…Differently from mormyriformes electric fish, gymnotiformes have an electric organ distributed along a large portion of the body, which fires sequentially. …”
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Checklist of the ichthyofauna of the Rio Negro basin in the Brazilian Amazon by Hélio Beltrão, Jansen Zuanon, Efrem Ferreira

“…The main groups are Characiformes (454 species; 39.0%), Siluriformes (416; 35.7%), Gymnotiformes (105; 9.0%), and Cichliformes (102; 8.8%). …”
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<b>Composição e abundância da ictiofauna na zona litorânea de um tributário, na zona de sua desembocadura no reservatório de Jurumirim, Estado de São Paulo, Brasil</b> - DOI: 10.40... by Reinaldo José de Castro, Fausto Foresti, Edmir Daniel Carvalho

“…Em menores abundâncias, ocorreram representantes das ordens Siluriformes, Gymnotiformes, Perciformes e Synbranchiformes. Diferenças significativas entre os índices de diversidade nas estações foram encontradas, mas entre os fatores abióticos não foram detectadas. …”
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