Published March 31, 2011
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A new species of Tetragonopterus Cuvier, 1816 (Characiformes: Characidae: Tetragonopterinae) from the rio Jari, Amapá, northern Brazil
Description
Melo, Bruno F., Benine, Ricardo C., Mariguela, Tatiane C., Oliveira, Claudio (2011): A new species of Tetragonopterus Cuvier, 1816 (Characiformes: Characidae: Tetragonopterinae) from the rio Jari, Amapá, northern Brazil. Neotropical Ichthyology 9 (1): 49-56, DOI: 10.1590/S1679-62252011000100002, URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100002&lng=en&tlng=en
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Identifiers
- LSID
- urn:lsid:plazi.org:pub:B56F4306FFFF1401FFD15A52FF9BFFFC
- URL
- http://publication.plazi.org/id/B56F4306FFFF1401FFD15A52FF9BFFFC
References
- Molecular analysis. DNA sequences were obtained from tissues of following samples: Tetragonopterus argenteus LBP 3758 (5), LBP 3058 (2), LBP 3059 (1), LBP 5535 (1); Tetragonopterus carvalhoi LBP 5306 (5 paratypes); Tetragonopterus chalceus LBP 264 (4), and Tetragonopterus rarus LBP 5375 (1). The sequences from 19 specimens resulted in a matrix with 779 base pairs (bp) from which 617 positions were conserved, and 161 were variable. 118 positions were parsimony informative. The nucleotide frequencies were 30.9% thymine/uracil, 24.7% cytosine, 24.6% adenine and 19.8% guanine. Graphical analyses does not show any saturation in transitions or transversions. The overall transition/transversion rate was 3.9. Genetic distances (Kimura, 1980) range from zero among specimens of Tetragonopterus chalceus from Sao Francisco basin to 0.125 ± 0.019 between T. carvalhoi and T. rarus, both from rio Jari (Table 2). Figure 4 presents the neighbor-joining majorityrule consensus tree with bootstrap values for 1,000 and N includes holotype and paratypes. SD = Standard deviation. pseudoreplicates which has the same topology observed in MP analyses. Three monophyletic groups (T. carvalhoi, T. chalceus, and T. argenteus) presented well-supported by values equal or higher than 97% in both methods of phylogenetic analysis.