Crenicichla yaha sp. n. (Perciformes: Labroidei: Cichlidae), a new species from the río Iguazú and arroyo Urugua-í basins, northeastern Argentina

" Crenicichla yaha sp. n. is described from the río Iguazú and arroyo Urugua-í basins
in Misiones Province, northeastern Argentina. Crenicichla yaha sp. n. can be differentiated from the remaining species within the genus by the following combination of characters: (1) serrated posterior border of the preopercle, (2) 48–51 scales on the E1 row, (3) isognathous jaws or slightly prognathous upper jaw, (4) presence of suborbital stripe, (5) fl anks with fi ve or six dark rectangular blotches just below the upper lateral line along dorsal-fi n base, and (6) lacking of vertical stripes. "