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| Melo,Marcelo R. S.; Buckup,Paulo A.; Oyakawa,Osvaldo T.. |
| ABSTRACT A new species of Characidium is described based on specimens obtained from the highland streams of the Serra do Mar, Atlantic Forest Biome, in Paraná State, Southern Brazil. The new species is possibly a member member of the C. lauroi group, which is diagnosed by having the isthmus unscaled, bars poorly marked, and spots on sides of body, and is composed by four additional species: C. japuhybense ; C. lauroi ; C. oiticicai ; and C. schubarti . The new species differs from its congeners with naked isthmus, except C. helmeri , by having 15-18 principal caudal-fin rays; and 10-12 pectoral-fin rays; and from C. helmeri , by having a slender body, tip of pectoral fin not reaching origin of pelvic fin, tip of pelvic fin not reaching beyond anus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characidium lauroi group; Mata Atlântica; Rio Iguaçu; Rio Ribeira de Iguape; South American Darters. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300210 |
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| Ingenito,Leonardo F. S.; Lima,Flávio C. T.; Buckup,Paulo A.. |
| A new species of Hyphessobrycon, H. peugeoti, is described from the middle portions of the rio Juruena drainage, upper rio Tapajós basin, Mato Grosso State, Brazil. It can be distinguished from all congeners, with the exception of H. loweae and H. heliacus, by a filamentous elongation of the dorsal fin and the approximately straight margin of the anal fin in adult males. It can be distinguished from both H. loweae and H. heliacus by an overall red coloration in life (vs. a golden coloration in life in the latter). Additionally, it can be distinguished from H. heliacus by the lack of chevron-like dark markings along the midline (vs. presence of chevron-like dark-markings in H. heliacus), and from H. loweae by the presence of only five horizontal scale rows... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Filamentous dorsal-fin; Hyphessobrycon elachys; Hyphessobrycon heliacus; Rio Tapajós basin; Rio Tocantins basin; Sexual dimorphism. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100033 |
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| Silveira,Luiz G. G.; Langeani,Francisco; Graça,Weferson J. da; Pavanelli,Carla S.; Buckup,Paulo A.. |
| Characidium xanthopterum is described from tributaries of the upper rio Paraná and upper rio Tocantins basins, in the Central Brazilian Plateau, Goiás State, Brazil. The new species is diagnosed among congeners by the absence of dark bars on the sides of the body in adult specimens, and by the deep yellow coloration in all fins. Ontogenetic change of color pattern is recorded for the first time for Characidium species. Specimens smaller than 32 mm SL possess dark bars on body. These bars disappear with growth between 32 and 35 mm SL, and are always absent in individuals larger than 35 mm SL. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characidiinae; South American darters; Upper rio Paraná; Upper rio Tocantins; Taxonomy; Sexual fin-hooks. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200003 |
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| Kantek,Daniel L. Z.; Peres,Wellington A. M.; Buckup,Paulo A.; Moreira-Filho,Orlando. |
| Specimens of Imparfinis schubarti (Gomes, 1956) collected in the Piumhi river drainage, state of Minas Gerais, Brazil, were studied cytogenetically. The river was diverted from the Rio Grande Basin into the São Francisco basin in the early 1960s. All individuals presented 2n = 58 chromosomes, including 18 metacentric, 34 submetacentric and six subtelocentric chromosomes. A secondary constriction was observed in the interstitial region of the long arm of the largest chromosome pair, coinciding with the NOR. A single conspicuous heterochromatic block located in the largest pair of metacentric chromosomes was observed, adjacent to the secondary constriction. A detectable 18S rDNA probe hybridization region occurs in only one chromosome pair and is synthenic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transposed river; Subclade nemuroglanis; FISH; São Francisco River Basin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400018 |
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| Moreira,Daniel A.; Buckup,Paulo A.; Britto,Marcelo R.; Magalhães,Maithê G. P.; Andrade,Paula C. C. de; Furtado,Carolina; Parente,Thiago E.. |
| ABSTRACT The complete mitogenome of Corydoras nattereri , a species of mailed catfishes from southeastern Brazil, was reconstructed using next-generation sequencing techniques. The mitogenome was assembled using mitochondrial transcripts from the liver transcriptomes of three individuals, and produced a circular DNA sequence of 16,557 nucleotides encoding 22 tRNA genes, two rRNA genes, 13 protein-coding genes and two noncoding control regions (D-loop, OrigL). Phylogeographic analysis of closely related sequences of Cytochrome Oxydase C subunit I (COI) demonstrates high diversity among morphologically similar populations of C. nattereri . Corydoras nattereri is nested within a complex of populations currently assigned to C. paleatus and C. ehrhardti .... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barcode; DNA; Mitogenome; Molecular diversity; MtRNA.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100218 |
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