Data/hora: 09/06/2024 11:37:33

Provedor de dados: | 83
País: | Brazil
Título: | A new species of Astyanax (Characiformes: Characidae) from the rio de Contas basin, Bahia, Brazil
Autores: | Zanata,Angela Maria; Burger,Rafael; Vita,George; Camelier,Priscila.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | Endemism; Northeastern Mata Atlântica freshwater ecoregion; Sexual dimorphism; Taxonomy.
Resumo: | ABSTRACT A new species of Astyanax from tributaries of the rio de Contas, Bahia, Brazil, is described. The new species differs from congeners by having three horizontal series of scales from lateral line to pelvic-fin origin and the distal margin of third infraorbital distinctly separated from vertical and horizontal limbs of preopercle, leaving a broad area not covered by superficial bones. The new species further differs from most congeners by the presence of bony hooks on all fins of mature males. Particularly from congeners occurring in rivers of the Northeastern Mata Atlântica freshwater ecoregion, it further differs by having the highest body depth just anterior to the dorsal-fin origin, 34-37 pored lateral line scales, a vertically elongated conspicuous dark humeral blotch reaching below the lateral line and a conspicuous dark wide midlateral stripe extending from the clear area on the rear of the humeral blotch to the end of middle caudal-fin rays and forming an inconspicuous blotch on caudal peduncle.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300208
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20190061
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.17 n.3 2019
Fonte: | info:eu-repo/semantics/openAccess