Imparfinis mishky (Siluriformes, Heptapteridae) a new species from the ríos Paraná and Uruguay basins in Argentina

ALMIRÓN, ADRIANA; CASCIOTTA, JORGE; BECHARA, JOSÉ; RUÍZ DÍAZ, FEDERICO; BRUNO, MARÍA CECILIA; D´AMBROSIO, DÉBORA SABINA; SOLIMANO, PATRICIO JOSÉ; SONEIRA, PAULA

REVUE SUISSE DE ZOOLOGIE

MUSEUM HISTOIRE NATURELLE

Año: 2007 vol. 114 p. 817 - 824

0035-418X

Imparfinis mishky (Siluriformes, Heptapteridae) a new species from the ríos Paraná and Uruguay basins in Argentina. - Imparfinis mishky sp. n. is described from the río Paraná and río Uruguay basins in Argentina. Imparfinis mishky sp. n. is distinguished from other species of the genus by the following combination of characters: pectoral-fin spine with smooth anterior and posterior margins; caudal fin deeply forked with dorsal lobe longer than ventral lobe; adipose fin not reaching caudal fin; body with six dark saddles across the dorsum, and without a mid- lateral band. It was found inhabiting well oxygenated, neutral pH, flowing waters, with sandy or cobble covered bottom.