Results 21 to 30 of about 672 (177)
A taxonomic review of the Neotropical electric fish Rhamphichthys (Gymnotiformes: Rhamphichthyidae) [PDF]
Neotropical Ichthyology, 2023 The species diversity and taxonomy of Rhamphichthys is reviewed and seven species are considered valid: Rhamphichthys apurensis from the Orinoco and Cuyuni river basins; R. drepanium from the Amazon and Orinoco river basins; R.
Tiago P. Carvalho, James S. Albert
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On a new species of the genus Moenkhausia Eigenmann (Ostariophysi: Characidae) [PDF]
Zootaxa, 2007 A new species of the genus Moenkhausia is described from the middle portions of the Rio Tocantins and tentatively from the Rio Apure in Venezuela, Rio Orinoco drainage. It is diagnosed by the presence of a dark spot in the half proximal length of the upper caudal-fin lobe, and by the presence of a large, irregularly shaped humeral spot located above ...
Lucinda, Paulo H. F. +2 more
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Ontogeny and homology of the neural complex of otophysan Ostariophysi [PDF]
Zoological Journal of the Linnean Society, 2006 The development and homology of the neural complex in the ostariophysan subgroup Otophysi were studied, including for the first time representatives of all four major otophysan lineages. Previous hypotheses concerning the homology of the different elements of the neural complex have also been reviewed and these are discussed in light of our new ...
Hoffmann, Matthias, Britz, Ralf
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New species of Curimatopsis from the río Caroni, Orinoco basin, Venezuela, with comments on C. macrolepis (Characiformes: Curimatidae) [PDF]
Neotropical Ichthyology, 2020 A new species of Curimatopsis is described from the highlands of the western Guiana Shield in the río Carapo and río Paragua, tributaries of the río Caroni in the Orinoco basin, southeastern Venezuela.
Bruno F. Melo
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Frontiers in Neuroscience, 2015 Basic and neutral neurohypophyseal (NH) nonapeptides have evolved from vasotocin (VT) by a gene duplication at the base of the gnathostome lineage. In teleosts, VT and IT are the basic and neutral peptides, respectively.
Putul eBanerjee +2 more
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Papéis Avulsos de Zoologia, 2012 Leporinus obtusidens Valenciennes, 1837 and L. elongatus Valenciennes, 1850 are redescribed based on the type specimens, including those of their junior synonyms, and recently collected specimens.
Heraldo A. Britski +2 more
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Neotropical Ichthyology, 2021 Schizodon encompasses approximately 15 species of Neotropical headstanding fishes. Integrative taxonomy, combining molecular and morphometric analyses with traditional taxonomic methods, was used to investigate Schizodon vittatus and its potential new ...
Júlio C. Garavello +5 more
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Neotropical Ichthyology, 2021 A new species of Rhyacoglanis is described from the rapids of Jatobal, Pará State, Brazil. This species differs from the congeners by fusing hypurals 3, 4, and 5 (vs. hypural 5 free).
Oscar A. Shibatta +2 more
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Description of a new species of Tatia from rio Tocantins drainage, central Brazil, with notes on Tatia simplex Mees, 1974 (Siluriformes, Auchenipteridae) [PDF]
Neotropical Ichthyology, 2020 Tatia comprises twenty-five valid species, distributed in the main inland watersheds of South America, including the Orinoco, Essequibo, and coastal rivers of Suriname, Amazon, upper rio Paraná and São Francisco basins.
Jordson de Souza e Souza +3 more
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Journal of Fish Biology, Volume 97, Issue 4, Page 1097-1112, October 2020., 2020 Abstract Sandy bottoms are a ubiquitous environment found from sea bottoms to intertidal and freshwater zones. They are inhabited by many invertebrates and vertebrates which have developed morphological and physiological adaptations to sustain life under these particular conditions.
Jérôme Canei +2 more
wiley +1 more source