ILPLA   05424
INSTITUTO DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Unidad Ejecutora - UE
artículos
Título:
A new species of Astyanax (Teleostei, Characiformes, Characidae), with breeding tubercles, from the Paraná and Uruguay river basins.
Autor/es:
PROTOGINO, L. C., A. M. MIQUELARENA & H. L. LÓPEZ
Revista:
Zootaxa
Editorial:
Magnolia Press
Referencias:
Lugar: Auckland, Nueva Zelanda; Año: 2006 p. 1 - 16
ISSN:
1175-5326
Resumen:
A new species of Astyanax, which is unusual in having breeding tubercles in mature males, is
described from the Paraná and Uruguay river basins. The new species is distinguished from all
other members of the genus by this feature, together with the following unique combination of
characters: a round or trapezoidal humeral spot; a branch of the infraorbital sensory canal directed
ventrally, continued as a series of pores totally or partially traversing the third infraorbital; body
relatively slender (31.837.4 %SL); eye large (41.145.8 %HL); snout short (15.520.9 %HL);
caudal peduncle relatively slender (10.312.0 %SL); maxilla with 1 pentacuspid tooth; 3842
perforated scales in lateral line and vvi, 2329 anal fin rays. Males have dermal contact organs on
all fins and epidermal breeding tubercles on the head and scales.Astyanax, which is unusual in having breeding tubercles in mature males, is
described from the Paraná and Uruguay river basins. The new species is distinguished from all
other members of the genus by this feature, together with the following unique combination of
characters: a round or trapezoidal humeral spot; a branch of the infraorbital sensory canal directed
ventrally, continued as a series of pores totally or partially traversing the third infraorbital; body
relatively slender (31.837.4 %SL); eye large (41.145.8 %HL); snout short (15.520.9 %HL);
caudal peduncle relatively slender (10.312.0 %SL); maxilla with 1 pentacuspid tooth; 3842
perforated scales in lateral line and vvi, 2329 anal fin rays. Males have dermal contact organs on
all fins and epidermal breeding tubercles on the head and scales.