A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae

In the present paper the new species Astyanax ojiara sp. n. is described, from the headwaters of Yabotí river, an affluent of Uruguay river in the province of Misiones, Argentinean northeast. A combination of characters differentiates the new species from other congeners: one heptacuspid maxillary t...

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Detalles Bibliográficos
Autores principales: Azpelicueta, María de las Mercedes, García, José O.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Naturales
Astyanax
Characidae
Characiformes
New species
Uruguay river
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84835
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84835
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Astyanax
Characidae
Characiformes
New species
Uruguay river
spellingShingle Ciencias Naturales
Astyanax
Characidae
Characiformes
New species
Uruguay river
Azpelicueta, María de las Mercedes
García, José O.
A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
topic_facet Ciencias Naturales
Astyanax
Characidae
Characiformes
New species
Uruguay river
description In the present paper the new species Astyanax ojiara sp. n. is described, from the headwaters of Yabotí river, an affluent of Uruguay river in the province of Misiones, Argentinean northeast. A combination of characters differentiates the new species from other congeners: one heptacuspid maxillary teeth; teeth of inner premaxillary row gently expanded distally; 7-9 dentary teeth decreasing in size anteroposteriorly; males with hooks in all fins; large males with pelvic axillary scale bearing 1 to 8 hooks; 36-38 perforated scales in lateral line; 20-23 branched anal-fin rays. Number of scales in the lateral line and branched anal-fin rays, humeral spot, and low body of Astyanax ojiara sp. n. resemble those of A. eigenmanniorum, but maxillary, premaxillary and dentary teeth differ in both species. The disposition of the dentary leeth is also similar in A. taeniatus and A. giton but A. ojiara sp. n. has one heptacuspid maxillary tooth.
format Articulo
Articulo
author Azpelicueta, María de las Mercedes
García, José O.
author_facet Azpelicueta, María de las Mercedes
García, José O.
author_sort Azpelicueta, María de las Mercedes
title A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
title_short A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
title_full A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
title_fullStr A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
title_full_unstemmed A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae
title_sort new species of astyanax (characiformes, characidae) from uruguay river basin in argentina, with remarks on hook presence in characidae
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/84835
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