Karyotypic similarities between two species of Rhamphichthys (Rhamphichthyidae, Gymnotiformes) from the Amazon basin by Patrícia Silva, Cleusa Nagamachi, Danillo Silva, Susana Milhomem, Adauto Cardoso, Jonas Oliveira, Julio Pieczarka

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A new species of Gymnotus (Gymnotiformes: Gymnotidae) from the Fitzcarrald Arch of southeastern Peru by Emmanuel L. Maxime, James S. Albert

“…This new species can also be distinguished from G. curupira by the configuration of the preopercular pores, and by several meristic traits of squamation and fin rays. This is the first gymnotiform species described from the interior of the Fitzcarrald Arch, and the only gymnotiform species known to date that is endemic to this upland region of the western Amazon.…”
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Chromosomal diversity in three species of electric fish (Apteronotidae, Gymnotiformes) from the Amazon Basin by Fernando Henrique Ramos Silva, Julio Cesar Pieczarka, Adauto Lima Cardoso, Patrícia Corrêa da Silva, Jonas Alves de Oliveira, Cleusa Yoshiko Nagamachi

“…Cytogenetic studies were carried out on samples of Parapteronotus hasemani, Sternarchogiton preto and Sternarchorhamphus muelleri (Apteronotidae, Gymnotiformes) from the Amazon basin. The first two species exhibited both a 2n = 52 karyotype, but differed in their karyotypic formulae, distribution of constitutive heterochromatin, and chromosomal location of the NOR. …”
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Chromosomal diversity in three species of electric fish (Apteronotidae, Gymnotiformes) from the Amazon Basin by Fernando Henrique Ramos Silva, Julio Cesar Pieczarka, Adauto Lima Cardoso, Patrícia Corrêa da Silva, Jonas Alves de Oliveira, Cleusa Yoshiko Nagamachi

“…Cytogenetic studies were carried out on samples of Parapteronotus hasemani, Sternarchogiton preto and Sternarchorhamphus muelleri (Apteronotidae, Gymnotiformes) from the Amazon basin. The first two species exhibited both a 2n = 52 karyotype, but differed in their karyotypic formulae, distribution of constitutive heterochromatin, and chromosomal location of the NOR. …”
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Reproductive biology of a population of Gymnotus aff.carapo (Teleostei: Gymnotidae) from southern Brazil by Diego de Paula Cognato, Clarice Bernhardt Fialho

Subjects: “…Gymnotiformes…”
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ENDOPARASITOS DE Gymnotus sp. (GYMNOTIFORMES: GYMNOTIDAE) DE ISQUEIROS COMERCIAIS NA BACIA DO PANTANAL, BRASIL CENTRAL by Arlene Sobrinho VENTURA, Santiago Benites de PÁDUA, Márcia Mayumi ISHIKAWA, Maurício Laterça MARTINS, Ricardo Massato TAKEMOTO, Gabriela Tomas JERÔNIMO

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Morphological and morphometric features of nematode-cysts in Gymnotus inaequilabiatus liver in the Brazilian Pantanal by Gizela Melina Galindo, Robson Andrade Rodrigues, Sandriely Fernanda Marcondes, Priscilla Soares, Luiz Eduardo Roland Tavares, Carlos Eurico Fernandes

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Electrolocation-communication discharges of the fish Gymnotus carapo L. (Gymnotidae: Gymnotiformes) during behavioral sleep by Stopa R.M., Hoshino K.

“…The electrical discharges of Gymnotus carapo L. (Gymnotidae: Gymnotiformes) were monitored to evaluate their ease and reliability as parameters to study sleep. …”
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Chromosomal evidence for a putative cryptic species in the <it>Gymnotus carapo </it>species-complex (Gymnotiformes, Gymnotidae) by De Souza Augusto CP, Silva Danillo S, Crampton William GR, Pieczarka Julio C, Milhomem Susana SR, Carvalho Jaime R, Nagamachi Cleusa Y

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A new vision of the origin and the oocyte development in the Ostariophysi applied to Gymnotus sylvius (Teleostei: Gymnotiformes) by Gisleine Fernanda França, Harry J. Grier, Irani Quagio-Grassiotto

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Kidney anatomy, histology and histometric traits associated to renosomatic index in Gymnotus inaequilabiatus (Gymnotiformes: Gymnotidae) by Carlos Eurico Fernandes, Sandrieley Fernanda Marcondes, Gizela Melina Galindo, Lilian Franco-Belussi

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Extensive Karyotype Reorganization in the Fish Gymnotus arapaima (Gymnotiformes, Gymnotidae) Highlighted by Zoo-FISH Analysis by Milla de Andrade Machado, Julio C. Pieczarka, Fernando H. R. Silva, Patricia C. M. O'Brien, Malcolm A. Ferguson-Smith, Cleusa Y. Nagamachi

“…The genus Gymnotus (Gymnotiformes) contains over 40 species of freshwater electric fishes exhibiting a wide distribution throughout Central and South America, and being particularly prevalent in the Amazon basin. …”
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Fish, Gymnotiformes, Apteronotidae, Rio Paranaíba drainage, Central Brazil, Porotergus ellisi: distribution extension by Volney Vono, Mauro Triques, Tiago Pessali

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Species diversity and geographic distribution of Gymnotus (Pisces: Gymnotiformes) by nuclear (GGAC)n microsatellite analysis by F.M.C. Fernandes-Matioli, S.R. Matioli, L.F. Almeida-Toledo

“…Patterns of amplified DNA fragments flanked by (GGAC)n microsatellites, obtained by single primer amplification reaction (SPAR), from 198 Gymnotus specimens (Pisces: Gymnotiformes) sampled from 8 southeastern Brazilian river basins were analyzed. …”
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Chromosome Painting in Gymnotus carapo “Catalão” (Gymnotiformes, Teleostei): Dynamics of Chromosomal Rearrangements in Cryptic Species by Milla de Andrade Machado, Maelin da Silva, Eliana Feldberg, Patricia Caroline Mary O’Brien, Malcolm Andrew Ferguson-Smith, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi

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Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil by Lilian Paula Faria-Pereira, Alexandre Wagner Silva Hilsdorf, James Albert, Maria José Tavares Ranzani Paiva, Márcia Santos Nunes Galvão

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Hematological and biometric traits of tuvira Gymnotus inaequilabiatus (Valenciennes, 1839) (Gymnotiformes: Gymnotidae) from the Brazilian Pantanal by ROBSON A. RODRIGUES, EDUARDA S. SILVA, SANDRIELY F. MARCONDES, GIZELA M. GALINDO, GUSTAVO G. DE OLIVEIRA, ALDA I. DE SOUZA, JOSÉ RAGUSA-NETTO, CARLOS E. FERNANDES

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Multiple rearrangements in cryptic species of electric knifefish, <it>Gymnotus carapo </it>(Gymnotidae, Gymnotiformes) revealed by chromosome painting by O'Brien Patricia CM, Milhomem Susana SR, Pieczarka Julio C, Nagamachi Cleusa Y, de Souza Augusto CP, Ferguson-Smith Malcolm A

“…<p>Abstract</p> <p>Background</p> <p><it>Gymnotus </it>(Gymnotidae, Gymnotiformes) is the Neotropical electric fish genus with the largest geographic distribution and the largest number of species, 33 of which have been validated. …”
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Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America by Edgar Esteban Herrera-Collazos, Aleidy M. Galindo-Cuervo, Javier A. Maldonado-Ocampo, Melissa Rincón-Sandoval

“…ABSTRACT Eigenmannia is one of the more taxonomically complex genera within the Gymnotiformes. Here we adopt an integrative taxonomic approach, combining osteology, COI gene sequences, and geometric morphometrics to describe three new species belonging to the E. trilineata species group from Colombian trans-Andean region. …”
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First chromosomal analysis of Gymnorhamphichthys britskii: the remarkable lowest diploid value within the family Rhamphichthyidae (Gymnotiformes) by Carlos Alexandre Fernandes, Allan Kardec Moreira de Aguiar, Leonardo Marcel Paiz, Lucas Baumgärtner, Diovani Piscor, Vladimir Pavan Margarido

“…Besides the present data are valuable to help in understanding karyotypic evolution in Rhamphichthyidae, data from NORs confirmed the tendency of this family in presenting simple NORs sites, similar to the other Gymnotiformes clades. Yet, the presence of a large heterochromatic block in the NOR-bearing chromosome can be used as cytogenetic markers for G. britskii, and that centric fusions appear to be an important mechanism in the karyotype evolution and differentiation among Gymnotiformes species.…”
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