Astyanax paris: A New Species from the Río Uruguay Basin of Argentina (Characiformes, Characidae)
2002; American Society of Ichthyologists and Herpetologists; Volume: 2002; Issue: 4 Linguagem: Inglês
10.1643/0045-8511(2002)002[1052
ISSN1938-5110
AutoresMaría de las Mercedes Azpelicueta, Adriana Almirón, Jorge Rafael Casciotta,
Tópico(s)Fish Ecology and Management Studies
ResumoA new species of the characid genus Astyanax is described. The species is currently known only from two localities in headwater streams of arroyo Yabotí-Guazú, a tributary of the upper río Uruguay, in Argentina. Astyanax paris n. sp. can be easily distinguished from all congeneres by the combination of relatively shallow body (34.9–39.4% SL), three or four maxillary teeth, fifth tooth of the inner premaxillary series posterior to main series, first humeral spot followed by a second one vertically elongated, sometimes wider than the first, a caudal spot continued onto the middle caudal fin rays, large dark chromatophores on the cheek, 34–36 perforated scales in the lateral series and, iv–v, 20–22 anal fin rays.
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