Consulta: subjectFacets:"Neoplecostominae"
Registros recuperados: 4
Data/hora: 08/06/2024 13:47:58

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann &amp;amp; Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil
Provedor de dados: 74
Autores: Reusing,Ana Flávia; Renesto,Erasmo; Roxo,Fábio F.; Zawadzki,Cláudio H.
Allozyme electrophoresis was used to examine 12 enzymatic systems in two populations of the genus Neoplecostomus from the Paraná River basin. Samples of Neoplecostomus sp. 1 were collected in Paraitinguinha stream of the Tietê River basin, in the municipality of Salesópolis, São Paulo State, and those of Neoplecostomus sp. 2 from São Domingos stream of the Rio Grande River basin, in the municipality of Muzambinho, Minas Gerais State. The genetic variability of the two populations was estimated by Nei's expected heterozygosity and was considered lower than average for populations of freshwater fish. The proportion of polymorphic loci was low (only 5.26% for the locus Idh). The low frequency of heterozygosity for both populations revealed a high fixation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allozymes; Genetic variability; Neoplecostominae; Neotropical fishes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300021

A new species of the armored catfish genus Pareiorhaphis Miranda Ribeiro (Siluriformes: Loricariidae) from the rio Paraguaçu, Bahia State, northeastern Brazil
Provedor de dados: 83
Autores: Pereira,Edson H. L.; Zanata,Angela M.
A new armored catfish species of the genus Pareiorhaphis is described from the middle and upper portions of rio Paraguaçu basin, coastal drainage of Bahia State, northeastern Brazil. The new species is readily distinguished from all its congeners by having two putative autapomorphies: (1) skin fold just posterior to each emergent tooth series of dentary formed by a single enlarged, flattened papilla, and (2) the midline of lower lip immediately behind the dentaries with small patch of distinct papillae arranged in a short median bump. In addition, the shallow caudal peduncle and comparatively lower number of teeth in each dentary also distinguishes the new species from all congeners. The new species is also compared to Pareiorhaphis bahianus, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cascudos; Chapada Diamantina; Neoplecostominae; Neoplecostomus; Pareiorhaphis bahianus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100035

Genetic variability in four samples of Neoplecostomus yapo (Teleostei: Loricariidae) from the rio Paranapanema basin, Brazil
Provedor de dados: 83
Autores: Philippsen,Juliana S.; Renesto,Erasmo; Gealh,Ana Maria; Artoni,Roberto F.; Shibatta,Oscar A.; Zawadzki,Claudio H.
Four samples of Neoplecostomus yapo were analyzed through the allozyme electrophoresis technique in corn starch gel. The allozyme pattern was similar to those found in N. paranensis with 24 loci scored. Two samples (ribeirão Atlântico and ribeirão Uraí) showed monomorphic bands for all 24 loci, whereas the other two (rio Verde and rio Fortaleza) showed 8.3% of polymorphic loci. The He genetic variability estimates for the rios Verde and Fortaleza populations were 0.0195 and 0.0179, respectively, too much inferior to the mean heterozygosity summed to species from the whole world (0.051). The Wright statistical values F IS = 0.5181, F IT = 0.5681 and F ST = 0.1039 and the genetic distance of Nei values showed that the four samples are genetically very...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allozymes; Genetic variation; Neoplecostominae; Neotropical fishes; Siluriformes.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100004

Resurrection of Pareiorhaphis Miranda Ribeiro, 1918 (Teleostei: Siluriformes: Loricariidae), and description of a new species from the rio Iguaçu basin, Brazil
Provedor de dados: 83
Autores: Pereira,Edson H. Lopes.
A new species of the loricariid subfamily Neoplecostominae is described on the basis of specimens obtained from the headwaters of the rio Iguaçu basin in the State of Paraná, southern Brazil. Pareiorhaphis parmula is the first representative of the genus discovered from the rio Paraná basin and expands the geographic distribution of the genus. It is diagnosed from other Pareiorhaphis species by having one small plate on each side of the pectoral girdle, just posterior to the gill opening and the club-shaped pectoral-fin spine, broadening from base to tip in adult males. All species formerly included in Hemipsilichthys except H. gobio, H. papillatus, and H. nimius are transferred to the genus Pareiorhaphis, which is resurrected from the synonymy of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical; Systematics; Neoplecostominae; Hemipsilichthys; Isbrueckerichthys.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200004