Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina

Autores
Azpelicueta, María de las Mercedes; Casciotta, Jorge Rafael; Almirón, Adriana Edith
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Astyanax leonidas and A. troya are described from the río Paraná basin in northeastern Argentina. Both species share similar number of anal-fin rays and perforated scales in the lateral line, one maxillary tooth, a deep dentary and the presence of small hooks on pectoral, pelvic, anal, and caudal fin of males. These characters are also present in A. ojiara and separate the three species from the remaining species of the genus. Astyanax leonidas is differenciated by the robust body, dorsal profile almost straight, a long and slender maxillary tooth, teeth of premaxillary inner row with notable long central cusp, dentary teeth of similar shape than those of premaxilla, and 4 large dentary teeth followed by one intermediate tooth, and 3 or 4 small teeth. Also this species does not have hooks on dorsal-fin rays and pelvic axillary scale. Astyanax troya has a dorsal profile with marked concavity on supraoccipital area, one broad and low pentacuspid maxillary teeth, teeth of inner premaxillary row gently expanded distally with cusps arising in the same line, central cusp of premaxillary teeth scarcely longer, 8-10 dentary teeth decreasing in size anteroposteriorly, and males with hooks in all fins and pelvic axillary scale.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Astyanax
Characidae
Characiformes
Iguazú basin
Paraná basin
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84676
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84676
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in ArgentinaAzpelicueta, María de las MercedesCasciotta, Jorge RafaelAlmirón, Adriana EdithCiencias NaturalesAstyanaxCharacidaeCharaciformesIguazú basinParaná basinAstyanax leonidas and A. troya are described from the río Paraná basin in northeastern Argentina. Both species share similar number of anal-fin rays and perforated scales in the lateral line, one maxillary tooth, a deep dentary and the presence of small hooks on pectoral, pelvic, anal, and caudal fin of males. These characters are also present in A. ojiara and separate the three species from the remaining species of the genus. Astyanax leonidas is differenciated by the robust body, dorsal profile almost straight, a long and slender maxillary tooth, teeth of premaxillary inner row with notable long central cusp, dentary teeth of similar shape than those of premaxilla, and 4 large dentary teeth followed by one intermediate tooth, and 3 or 4 small teeth. Also this species does not have hooks on dorsal-fin rays and pelvic axillary scale. Astyanax troya has a dorsal profile with marked concavity on supraoccipital area, one broad and low pentacuspid maxillary teeth, teeth of inner premaxillary row gently expanded distally with cusps arising in the same line, central cusp of premaxillary teeth scarcely longer, 8-10 dentary teeth decreasing in size anteroposteriorly, and males with hooks in all fins and pelvic axillary scale.Facultad de Ciencias Naturales y Museo2002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf243-259http://sedici.unlp.edu.ar/handle/10915/84676enginfo:eu-repo/semantics/altIdentifier/issn/0035-418Xinfo:eu-repo/semantics/altIdentifier/doi/10.5962/bhl.part.79588info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:08:12Zoai:sedici.unlp.edu.ar:10915/84676Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:08:12.75SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
title Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
spellingShingle Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
Azpelicueta, María de las Mercedes
Ciencias Naturales
Astyanax
Characidae
Characiformes
Iguazú basin
Paraná basin
title_short Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
title_full Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
title_fullStr Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
title_full_unstemmed Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
title_sort Two new species of the genus Astyanax (Characiformes, Characidae) from the Paraná river basin in Argentina
dc.creator.none.fl_str_mv Azpelicueta, María de las Mercedes
Casciotta, Jorge Rafael
Almirón, Adriana Edith
author Azpelicueta, María de las Mercedes
author_facet Azpelicueta, María de las Mercedes
Casciotta, Jorge Rafael
Almirón, Adriana Edith
author_role author
author2 Casciotta, Jorge Rafael
Almirón, Adriana Edith
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Astyanax
Characidae
Characiformes
Iguazú basin
Paraná basin
topic Ciencias Naturales
Astyanax
Characidae
Characiformes
Iguazú basin
Paraná basin
dc.description.none.fl_txt_mv Astyanax leonidas and A. troya are described from the río Paraná basin in northeastern Argentina. Both species share similar number of anal-fin rays and perforated scales in the lateral line, one maxillary tooth, a deep dentary and the presence of small hooks on pectoral, pelvic, anal, and caudal fin of males. These characters are also present in A. ojiara and separate the three species from the remaining species of the genus. Astyanax leonidas is differenciated by the robust body, dorsal profile almost straight, a long and slender maxillary tooth, teeth of premaxillary inner row with notable long central cusp, dentary teeth of similar shape than those of premaxilla, and 4 large dentary teeth followed by one intermediate tooth, and 3 or 4 small teeth. Also this species does not have hooks on dorsal-fin rays and pelvic axillary scale. Astyanax troya has a dorsal profile with marked concavity on supraoccipital area, one broad and low pentacuspid maxillary teeth, teeth of inner premaxillary row gently expanded distally with cusps arising in the same line, central cusp of premaxillary teeth scarcely longer, 8-10 dentary teeth decreasing in size anteroposteriorly, and males with hooks in all fins and pelvic axillary scale.
Facultad de Ciencias Naturales y Museo
description Astyanax leonidas and A. troya are described from the río Paraná basin in northeastern Argentina. Both species share similar number of anal-fin rays and perforated scales in the lateral line, one maxillary tooth, a deep dentary and the presence of small hooks on pectoral, pelvic, anal, and caudal fin of males. These characters are also present in A. ojiara and separate the three species from the remaining species of the genus. Astyanax leonidas is differenciated by the robust body, dorsal profile almost straight, a long and slender maxillary tooth, teeth of premaxillary inner row with notable long central cusp, dentary teeth of similar shape than those of premaxilla, and 4 large dentary teeth followed by one intermediate tooth, and 3 or 4 small teeth. Also this species does not have hooks on dorsal-fin rays and pelvic axillary scale. Astyanax troya has a dorsal profile with marked concavity on supraoccipital area, one broad and low pentacuspid maxillary teeth, teeth of inner premaxillary row gently expanded distally with cusps arising in the same line, central cusp of premaxillary teeth scarcely longer, 8-10 dentary teeth decreasing in size anteroposteriorly, and males with hooks in all fins and pelvic axillary scale.
publishDate 2002
dc.date.none.fl_str_mv 2002
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/84676
url http://sedici.unlp.edu.ar/handle/10915/84676
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-418X
info:eu-repo/semantics/altIdentifier/doi/10.5962/bhl.part.79588
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
243-259
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.22299

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