Molecular phylogeny reveals a new species of ghost electric knifefish Porotergus Ellis 1912 (Gymnotiformes: Apteronotidae), from the Amazon basin. [PDF]
J Fish BiolA new species of ghost electric knifefish, Porotergus sambaibensis sp. nov., is described from the Javaés River, a tributary of the Araguaia River in Brazil.
Mendonça MB +4 more
europepmc +3 more sources
Early Biogeography of Otophysi Points to the Neotropics as the Cradle of Characiphysan Fishes [PDF]
Ecology and EvolutionFreshwaters represent less than 1% of Earth's surface and only 0.02% of the available aquatic habitable volume, yet they host nearly half of the 35,500 known species of bony fishes.
Achille Lenglin +9 more
doaj +3 more sources
De Novo Genome Assembly of the Electric Fish Brachyhypopomus occidentalis (Hypopomidae, Gymnotiformes) [PDF]
Genome Biology and Evolution, 2021 The bluntnose knifefish Brachyhypopomus occidentalis is a primary freshwater fish from north-western South America and Lower Central America.
Luis F de Leon +2 more
exaly +3 more sources
Structural and histochemical aspects of the Gymnotus carapo tegument (Teleostei: Gymnotiformes) [PDF]
Anais da Academia Brasileira de Ciências, 2023 The present study aims to structurally and histochemically characterize the Gymnotus carapo tegument. 30 specimens were captured and slaughtered by spinal section with anesthesia.
TANIA BLANCO COHENE +2 more
doaj +5 more sources
Whole chromosome painting in two populations of the weakly electric fish Gymnotus mamiraua (Teleostei, Gymnotiformes). [PDF]
Sci RepTechniques such as whole chromosome painting (WCP) have effectively expanded our understanding of the evolution and organization of the genome in fish, allowing us to obtain more detailed information about several evolutionary questions.
Pety AM +8 more
europepmc +2 more sources
Molecular and cytogenetic data for Rhamphichthys Müller and Troschel, 1848 (Rhamphichthyidae - Gymnotiformes): Evidence of chromosomal differentiation in R. heleios, R. hahni, R. rostratus and R. pantherinus. [PDF]
Genet Mol BiolRhamphichthys (Gymnotiformes), a genus with uncertain taxonomy due to rarity and morphological similarity, exhibits greater diversity in the Amazon Basin.
Costa MJRD +5 more
europepmc +2 more sources
Karyotype description and comparative chromosomal mapping of rDNA and U2 snDNA sequences in Eigenmannialimbata and E.microstoma (Teleostei, Gymnotiformes, Sternopygidae). [PDF]
Comp Cytogenet, 2022 Abstract The genus Eigenmannia Jordan et Evermann,1896 includes electric fishes endemic to the Neotropical region with extensive karyotype variability and occurrence of different sex chromosome systems, however, cytogenetic studies within this group are
Araya-Jaime CA +5 more
europepmc +2 more sources
Mapping of Repetitive Sequences in Brachyhypopomus brevirostris (Hypopomidae, Gymnotiformes) from the Brazilian Amazon [PDF]
Animals (Basel)Simple Summary Neotropical electric fish have a large diversity in the Amazon region. We investigated the karyotype of the species Brachyhypopomus brevirostris from two localities in Brazil’s northern region, Santarém in Pará state and Tefé in Amazonas ...
Paula Pinto Rodrigues +5 more
europepmc +2 more sources
Neotropical Ichthyology, 2022 The present study offers a broad comparative analysis of the dorsolateral head musculature in the Gymnotiformes, with detailed descriptions and illustrations of the dorsolateral head muscles of 83 species representing combined all valid genera.
Luiz Antônio Wanderley Peixoto +1 more
doaj +2 more sources
Archolaemus janeae (Gymnotiformes, Teleostei): First insights into karyotype and repetitive DNA distribution in two populations of the Amazon. [PDF]
Ecol Evol, 2021 Archolaemus, one of the five genera of Neotropical freshwater fish of the family Sternopygidae (Gymnotiformes), was long considered a monotypic genus represented by Archolaemus blax.
Rodrigues PP +6 more
europepmc +2 more sources