Data/hora: 10/06/2024 09:02:08

Provedor de dados: | Neotropical Ichthyology
País: | Brazil
Título: | A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela
Autores: | Ota,Rafaela Priscila; Py-Daniel,Lúcia Helena Rapp; Jégu,Michel.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Biogeography; Metynnis hypsauchen; Osteological description; Phylogeny; Taxonomy.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400205
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20160023
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.14 n.4 2016
Fonte: | info:eu-repo/semantics/openAccess