Brachyhypopomus gauderio, new species, a new example of underestimated species diversity of electric fishes in the southern South America (Gymnotiformes: Hypopomidae)

  title={Brachyhypopomus gauderio, new species, a new example of underestimated species diversity of electric fishes in the southern South America (Gymnotiformes: Hypopomidae)},
  author={J{\'u}lia Giora and Luiz Roberto Malabarba},
Brachyhypopomus gauderio n. sp. is described here from the central, southern and coastal regions of the Rio Grande do Sul state, Brazil, from Uruguay, and from Paraguay. It is diagnosed from the congeners on the basis of body coloration, meristic and morphometric characters, such as the number of anal-fin rays, the position of anal-fin origin in relation to pectoral-fin, the morphology of the distal portion of caudal filament of mature males, and body proportions. The new species has been… 

Pisces, Gymnotiformes, Hypopomidae, Brachyhypopomus Mago-Leccia, 1994: first country record of three species of the genus, Argentina

Brachyhypopomus bombilla, B. draco and B. gauderio are recorded for the first time in freshwaters of Argentina and can be sympatric and syntopic in Pre-Delta National Park, whereas B. bombilla andB.

A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species

15 new species are described, and redescriptions of all 13 previously described species are provided, based on meristic, morphometric, and other morphological characters, of Brachyhypopomus, which is abundant in shallow lentic and slow-flowing freshwater habitats from southern Costa Rica and northern Venezuela to Uruguay and northern Argentina.

Cytogenetic Analysis of Two Species of Brachyhypopomus (Hypopomidae): New Inferences about Karyotypic Diversification of Grass Knifefish

The karyotype evolution of this group is a dynamic process based on Robertsonian translocations, pericentric inversions, and intense reorganization of the heterochromatic elements.

Reproduction and Feeding of the Electric Fish Brachyhypopomus gauderio (Gymnotiformes: Hypopomidae) and the Discussion of a Life History Pattern for Gymnotiforms from High Latitudes

According to the analysis of the food items, B. gauderio feed mainly on autochthonous insects, likewise the other gymnotiforms previously investigated, leading to conclude that there is no variation on the diet of the species of the order related to climatic conditions or even to habitat of occurrence.

Fishes from Parque Estadual de Itapeva, Rio Grande do Sul state, Atlantic Forest biome, Brazil

This study represents the first fish survey in the protected area, Atlantic Forest biome, of Rio Grande do Sul state and resulted in 26 species, in 20 genera, 15 families, and six orders.

Ichthyofauna from three streams of the lower Iguatemi River in the upper Paraná river basin, Brazil

Despite the high ichthyofauna richness in the lower portion of Iguatemi River, the need to implement and/or expand soil conservation practices and riparian forest restoration is of utmost importance to maintain these populations in the long term.

First record of supernumerary (B) chromosomes in electric fish (Gymnotiformes) and the karyotype structure of three species of the same order from the upper Paraná River basin

The finding of B chromosomes in Apteronotus prope albifrons represents the first description of these elements in the Gymnotiformes order and the karyotype of Brachyhypopomus gauderio, a new species, provides an important reference for future chromosome studies of the BrachyHypopmus Mago-Lecia, 1994.

Ichthyofauna of lotic environments in the Ivinhema river basin, upper Paraná river, Mato Grosso do Sul state, Brazil

Abstract: In order to inventory the species richness and fish fauna composition along the Ivinhema river basin, 232 stretches of rivers and streams were sampled from 2000 to 2018, using a rectangular

DNA barcoding techniques used to identify the shared ichthyofauna between the Pantanal floodplain and Upper Parana River

The results demonstrate that human interventions possibly participated in the distribution of some lineages and suggest that the number of species that are present in these two basins is underestimated and that human actions can irreversibly affect the natural history of the species in these regions.

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