Data/hora: 09/06/2024 17:44:45

Provedor de dados: 	83	
País: 	Brazil	
Título: 	A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil	
Autores: 	Pavanelli,Carla Simone; Oliveira,Carlos Alexandre Miranda.	
Data: 	2009-01-01	
Ano: 	2009	
Palavras-chave: 	Neotropical region; Synonymy; Buccal polymorphism; Psalidodon.	
Resumo: 	Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish endemic to the Rio Iguaçu basin in Southern Brazil, is redescribed. The species was originally described as belonging to the monotypic genus Psalidodon, distinguished from Astyanax by the possession of a single series of teeth on the premaxilla (vs. two series), by the presence of relatively compressed teeth on the premaxillary and dentary bones (vs. relatively bulky teeth), and by the absence of lips (vs. lips present). Examination of a large number of specimens from the rio Iguaçu basin that present dental and lip features that were intermediate between Psalidodon and Astyanax indicated that specimens attributed to Psalidodon show extreme characters observed within a polymorphic Astyanax species. Accordingly, the genus Psalidodon is synonymized under Astyanax. Specimens of "Astyanax sp. F" morphotype from the rio Iguaçu basin belong to the species Astyanax gymnodontus and display a regular tooth arrangement and morphology, and their lip development is similar to that of other Astyanax species.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400003	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252009000400003	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.7 n.4 2009	
Fonte: 	info:eu-repo/semantics/openAccess