2016
DOI: 10.1590/1982-0224-20150141
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Abstract: Characiformes is the most cytogenetically studied group of freshwater Actinopterygii, but karyotypical data of several taxa remain unknown. This is the case of Nematocharax, regarded as a monotypic genus and characterized by marked sexual dimorphism. Therefore, we provide the first cytogenetic report of allopatric populations of Nematocharax venustus based on distinct methods of chromosomal banding and fluorescence in situ hybridization (FISH) with repetitive DNA probes (18S and 5S rDNA). The karyotype macrost… Show more

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Cited by 3 publications
(9 citation statements)
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“…conspicuous roundish dark caudal blotch on the terminal portion of the caudal peduncle). Besides morphological and morphometric characters, N. varii can also be distinguished from N. venustus by cytogenetic traits (Barreto et al ., ) and molecular divergence (Barreto et al ., ; present study). (See Discussion for more details regarding the molecular differences between both species).…”
Section: Resultsmentioning
confidence: 52%
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“…conspicuous roundish dark caudal blotch on the terminal portion of the caudal peduncle). Besides morphological and morphometric characters, N. varii can also be distinguished from N. venustus by cytogenetic traits (Barreto et al ., ) and molecular divergence (Barreto et al ., ; present study). (See Discussion for more details regarding the molecular differences between both species).…”
Section: Resultsmentioning
confidence: 52%
“…Accordingly, the upper Contas River population also had the largest genetic distance when compared with the others based on nuclear genes (Tables S7 to S11). Thus, the present results along with previous reports based on DNA barcode, geometric morphometrics and cytogenetics (Barreto et al ., , 2016b) reinforce the status of the Nematocharax lineage from the upper Contas River as a new species for the genus, described below as Nematocharax varii .…”
Section: Resultsmentioning
confidence: 99%
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