140 research outputs found
Revision of the genus Macropsobrycon Eigenmann, 1915 (Characidae: Cheirodontinae: Compsurini)
New Hyphessobrycon from the upper rio Pardo drainage in eastern Brazil (Teleostei: Characiformes: Characidae)
A review of the Cis-Andean species of Hemibrycon GĂŒnther (Teleostei: Characiformes: Characidae: Stevardiinae), with description of two new species
New species of the genus Leporinus Agassiz (Characiformes: Anostomidae) from the rio CuruĂĄ, rio Xingu basin, Serra do Cachimbo, Brazil, with comments on Leporinus reticulatus
New species of miniature fish from MarajĂł Island, ParĂĄ, Brazil, with comments on its relationships (Characiformes: Characidae)
A new miniature species of the family Characidae from Marajó Island, Pará State, Brazil is described and assigned to the genus Tyttobrycon. The new species can be distinguished from its congeners primarily by having multicuspid teeth on jaws, and additionally by having the combination of 5-7 premaxillary teeth, dorsal fin only with scattered melanophores and the presence of an adipose fin
Dental development and ontogenetic diet shifts of Roeboides paranensis Pignalberi (Osteichthyes, Characinae) in pools of the Upper Rio ParanĂĄ floodplain (State of ParanĂĄ, Brazil)
Taxonomic review of Colombian Parodon (Characiformes: Parodontidae), with descriptions of three new species
A new species of the characid genus Hollandichthys Eigenmann from coastal rivers of southern Brazil (Teleostei: Characiformes) with a discussion on the diagnosis of the genus
New species of Hasemania (Characiformes: Characidae) from Central Brazil, with comments on the endemism of upper rio Tocantins basin, GoiĂĄs State
Hasemania kalunga Ă© descrita para a bacia do alto rio Tocantins, Chapada dos Veadeiros, GoiĂĄs, Brasil. A espĂ©cie nova distingue-se das suas congĂȘneres pelo nĂșmero de escamas perfuradas da linha lateral (11-21 vs. 5-9, exceto de H. crenuchoides e H. piatan), pela presença de uma mancha umeral preta e verticalmente alongada (vs. ausĂȘncia, exceto de H. crenuchoides, H. nambiquara e H. piatan), e pela ausĂȘncia de escamas na base da nadadeira anal (vs. presença, exceto de H. maxillaris e H. piatan), por 19 raios principais na nadadeira caudal (vs.18 em H. piatan). Ela tambĂ©m difere de H. crenuchoides por dados morfomĂ©tricos. A ausĂȘncia de uma bainha de escamas cobrindo a base da nadadeira anal, um carĂĄter incomum em Characidae, e o endemismo da ictiofauna do alto rio Tocantins sĂŁo discutidos.Hasemania kalunga is described from the upper rio Tocantins basin, Chapada dos Veadeiros, GoiĂĄs State, Brazil. The new species is distinguished from its congeners by the number of perforated lateral line scales (11-21 vs. 5-9, except from H. crenuchoides and H. piatan), by the presence of a black vertically-elongate humeral spot (vs. absent, except from H. crenuchoides, H. nambiquara, and H. piatan), and by absence of scale sheath along anal-fin base (vs. presence, except from H. maxillaris, and H. piatan), by 19 principal caudal-fin rays (vs. 18 in H. piatan). It differs also from H. crenuchoides by morphometric data. The absence of scale sheath covering the anal-fin base, an uncommon character in Characidae, and the endemism of the ichthyofauna from the upper rio Tocantins are discussed
Two new species of Moenkhausia Eigenmann (Characiformes: Characidae) from Serra do Cachimbo, ParĂĄ, Northern Brazil
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