Results 121 to 130 of about 2,449 (227)

Gymnotus refugio, a new and endangered species of electric fish of the Gymnotus pantherinus species-group from southern Brazil (Gymnotiformes: Gymnotidae)

, 2016
Giora, Julia, Malabarba, Luiz Roberto (2016): Gymnotus refugio, a new and endangered species of electric fish of the Gymnotus pantherinus species-group from southern Brazil (Gymnotiformes: Gymnotidae).
Giora, Julia, Malabarba, Luiz Roberto
core   +1 more source

Revision of Gymnotus (Gymnotiformes: Gymnotidae) from the Upper Madeira Basin of Bolivia and Peru, with descriptions of two new species

, 2018
Craig, Jack M., Correa-Roldán, Vanessa, Ortega, Hernán, Crampton, William G. R., Albert, James S. (2018): Revision of Gymnotus (Gymnotiformes: Gymnotidae) from the Upper Madeira Basin of Bolivia and Peru, with descriptions of two new species.
Craig, Jack M., Correa-Roldán, Vanessa, JACK M. CRAIG, VANESSA CORREA-ROLDÁN, Ortega, Hernán, HERNÁN ORTEGA, Crampton, William G. R., JAMES S. ALBERT, Crampton, William G.R., WILLIAM G. R. CRAMPTON, Albert, James S.   +10 more
core   +1 more source

Profile of micronucleus frequencies and nuclear abnormalities in different species of electric fishes (Gymnotiformes) from the Eastern Amazon

Genetics and Molecular Biology, 2013
The frequency of spontaneous micronucleus (MN) formation in fish species needs to be determined to evaluate their usefulness for genotoxic biomonitoring.
Karina Motta Melo, Ingrid Reale Alves, Julio Cesar Pieczarka, José Augusto de Oliveira David, Cleusa Yoshiko Nagamachi, Cesar Koppe Grisolia   +5 more
doaj  

Ultrastructure of spermiogenesis and spermatozoa of Gymnotus cf. anguillaris and Brachyhypopomus cf. pinnicaudatus (Teleostei : Gymnotiformes)

, 2015
The ultrastructure of spermiogenic stages and spermatozoa of representatives of two gymnotiform families, Gymnotus cf. anguillaris (Gymnotidae) and Brachyhypopomus cf. pinnicaudatus (Hypopomidae) were studied.
Oliveira, C, Franca, GF, Quagio-Grassiotto, I, França, G F   +3 more
core   +1 more source

Systematics and biogeography of Sternarchellini (Gymnotiformes: Apteronotidae): Diversification of electric fishes in large Amazonian rivers

, 2014
Fig. 7. Scatter plot of PC1 and PC2 for 56 specimens representing species in the S. sima group. Loadings of all 13 variables for PC2 reported in lower panel. Sternarchella sima represented as circles (n= 19), and S. orinoco as squares (n= 37).
James S. Albert, Ivanyisky Iii, Stephen J., Stephen J. Ivanyisky III, Albert, James S.   +3 more
core   +1 more source

Fallen leaves on the water-bed: diurnal camouflage of three night active fish species in an Amazonian streamlet

Neotropical Ichthyology
Resemblance to dead leaves is a well known type of camouflage recorded for several small vertebrates that dwell in the leaf and root litter on the ground.
Ivan Sazima, Lucélia Nobre Carvalho, Fernando Pereira Mendonça, Jansen Zuanon   +3 more
doaj   +1 more source

The diversity and evolution of electric organs in Neotropical knifefishes. [PDF]

Evodevo, 2022
Bray IE, Alshami IJJ, Kudoh T.
europepmc   +1 more source

FIGURE 4 in New species of glass knifefish Eigenmannia loretana (Gymnotiformes: Sternopygidae) from the Western Amazon

, 2018
FIGURE 4. Line drawing of medial view of mandible (UF 116557, 141 mm) of Eigenmannia loretana. Abbreviations: d, dentary; ang, anguloarticular; cb, coronomeckelian bone; mc, Meckel's cartilage; r, retroarticular.
BRANDON T. WALTZ, Waltz, Brandon T., JAMES S. ALBERT, Albert, James S.   +3 more
core   +1 more source

Cytogenetic characterization of the strongly electric Amazonian eel, Electrophorus electricus (Teleostei, Gymnotiformes), from the Brazilian rivers Amazon and Araguaia

, 2017
A karyotype analysis of the electric eel, Electrophorus electricus (Teleostei, Gymnotiformes), a strongly electric fish from northern South America, is presented.
Almeida-Toledo, Lurdes Foresti de, Porto-Foresti, Fabio, Daniel-Silva, Maria de Fatima Z., Akama, Alberto, Senhorini, Jose A., Fonteles, Soraia B.A., Lopes, Carlos E., Fernandes, Flora M.C., Foresti, Fausto   +8 more
core  

Unravelling the genomic features, phylogeny and genetic basis of tooth ontogenesis in Characiformes through analysis of four genomes. [PDF]

DNA Res, 2023
Yang X, Song Y, Zhang R, Yu M, Guo X, Guo H, Du X, Sun S, Li C, Mao X, Fan G, Liu X.   +11 more
europepmc   +1 more source