A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil
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 seri...
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Sociedade Brasileira de Ictiologia
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doaj-7d01c6a14e9545408f1799dafd3a17022020-11-25T00:22:30ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02247456957810.1590/S1679-62252009000400003S1679-62252009000400003A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, BrazilCarla Simone Pavanelli0Carlos Alexandre Miranda Oliveira1Universidade Estadual de MaringáUniversidade Estadual de MaringáAstyanax 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400003&lng=en&tlng=enNeotropical regionSynonymyBuccal polymorphismPsalidodon |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Carla Simone Pavanelli Carlos Alexandre Miranda Oliveira |
spellingShingle |
Carla Simone Pavanelli Carlos Alexandre Miranda Oliveira A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil Neotropical Ichthyology Neotropical region Synonymy Buccal polymorphism Psalidodon |
author_facet |
Carla Simone Pavanelli Carlos Alexandre Miranda Oliveira |
author_sort |
Carla Simone Pavanelli |
title |
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil |
title_short |
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil |
title_full |
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil |
title_fullStr |
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil |
title_full_unstemmed |
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil |
title_sort |
redescription of astyanax gymnodontus (eigenmann, 1911), new combination, a polymorphic characid fish from the rio iguaçu basin, brazil |
publisher |
Sociedade Brasileira de Ictiologia |
series |
Neotropical Ichthyology |
issn |
1982-0224 |
description |
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. |
topic |
Neotropical region Synonymy Buccal polymorphism Psalidodon |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400003&lng=en&tlng=en |
work_keys_str_mv |
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