Astyanax hermosus, a new species from the Primero River basin, Córdoba, Argentina (Characiformes, Characidae)
A new species of the characid genus Astyanax is described from the endorheic Primero River basin, in central Argentina: Astyanax hermosus sp. n. This species can be distinguished from all other in the genus by the following combination of characters: body relatively low (33.1-38.7% SL); head short (...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2005 |
| País: | Argentina |
| Recursos: | Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
| Repositório: | CIC Digital (CICBA) |
| Idioma: | inglês |
| OAI Identifier: | oai:digital.cic.gba.gob.ar:11746/7078 |
| Acesso em linha: | https://digital.cic.gba.gob.ar/handle/11746/7078 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Ciencias Naturales y Exactas Peces Biodiversidad Ostariophysi Characidae Astyanax new species taxonomy Central Argentina |
| Resumo: | A new species of the characid genus Astyanax is described from the endorheic Primero River basin, in central Argentina: Astyanax hermosus sp. n. This species can be distinguished from all other in the genus by the following combination of characters: body relatively low (33.1-38.7% SL); head short (23.5-27.1% SL); snout short (18.3-26.6% HL); interorbital broad (34.9-41.5% HL); maxilla with 1-3 teeth, usually one; iv-v, 17-22 anal-fin rays; 35-38 perforated scales on the lateral line; transverse scales 7/6; and distinctive color pattern, with Y-shaped humeral spot, a broad grayish longitudinal stripe on the flanks, extending weakly onto the middle caudal-fin rays, and extremely dark opercular, subopercular and preopercular regions. In addition, the males of the new species are distinguished by the presence of bony hooks in all their fins. |
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