A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela
ABSTRACT A new Metynnis is described from the rio Negro in Brazil and Venezuela, and from black- or clearwater tributaries in Brazil including the rios Parauari, Uatumã, Trombetas, and Sucunduri (the latter belonging to the rio Madeira basin). The new species can be distinguished readily from all co...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400205&lng=en&tlng=en |
| _version_ | 1811202652613115904 |
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| author | Rafaela Priscila Ota Lúcia Helena Rapp Py-Daniel Michel Jégu |
| author_facet | Rafaela Priscila Ota Lúcia Helena Rapp Py-Daniel Michel Jégu |
| author_sort | Rafaela Priscila Ota |
| collection | DOAJ |
| description | ABSTRACT A new Metynnis is described from the rio Negro in Brazil and Venezuela, and from black- or clearwater tributaries in Brazil including the rios Parauari, Uatumã, Trombetas, and Sucunduri (the latter belonging to the rio Madeira basin). The new species can be distinguished readily from all congeners by having a high concentration of dark chromatophores on the lateral line scales. It can be further distinguished by the combination of head length 24.3-27.5% of SL, 13-18 gill-rakers on upper limb and 16-24 gill-rakers on lower limb. The new species is most similar to and likely most closely related to Metynnis hypsauchen . These two species share a similar color pattern, body shape and sexual dimorphism of the anal fin. However, they differ in that M. hypsauchen has a lightly pigmented lateral line. The new species is also distinguished from M. hypsauchen by having 56-65 predorsal scales and 90-104 lateral line scales (vs . 36-54, and 65-82, respectively). A detailed osteological description of the new species is provided. |
| first_indexed | 2024-04-12T02:43:18Z |
| format | Article |
| id | doaj.art-b39eb773c08e447b9f9e526cc1270a99 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-12T02:43:18Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-b39eb773c08e447b9f9e526cc1270a992022-12-22T03:51:16ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-022414410.1590/1982-0224-20160023S1679-62252016000400205A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern VenezuelaRafaela Priscila OtaLúcia Helena Rapp Py-DanielMichel JéguABSTRACT A new Metynnis is described from the rio Negro in Brazil and Venezuela, and from black- or clearwater tributaries in Brazil including the rios Parauari, Uatumã, Trombetas, and Sucunduri (the latter belonging to the rio Madeira basin). The new species can be distinguished readily from all congeners by having a high concentration of dark chromatophores on the lateral line scales. It can be further distinguished by the combination of head length 24.3-27.5% of SL, 13-18 gill-rakers on upper limb and 16-24 gill-rakers on lower limb. The new species is most similar to and likely most closely related to Metynnis hypsauchen . These two species share a similar color pattern, body shape and sexual dimorphism of the anal fin. However, they differ in that M. hypsauchen has a lightly pigmented lateral line. The new species is also distinguished from M. hypsauchen by having 56-65 predorsal scales and 90-104 lateral line scales (vs . 36-54, and 65-82, respectively). A detailed osteological description of the new species is provided.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400205&lng=en&tlng=enBiogeographyMetynnis hypsauchenOsteological descriptionPhylogenyTaxonomy |
| spellingShingle | Rafaela Priscila Ota Lúcia Helena Rapp Py-Daniel Michel Jégu A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela Neotropical Ichthyology Biogeography Metynnis hypsauchen Osteological description Phylogeny Taxonomy |
| title | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela |
| title_full | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela |
| title_fullStr | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela |
| title_full_unstemmed | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela |
| title_short | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela |
| title_sort | new silver dollar species of metynnis cope 1878 characiformes serrasalmidae from northwestern brazil and southern venezuela |
| topic | Biogeography Metynnis hypsauchen Osteological description Phylogeny Taxonomy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400205&lng=en&tlng=en |
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