new species:
Crenicichla yaha Casciotta, Almirón & Gómez, 2006

published in:
Casciotta, J.R., A.E. Almirón & S.E. Gómez (2006):
Crenicichla yaha sp. n. (Perciformes: Labroidei: Cichlidae), a new species from the río Iguazú and arroyo Urugua-í basins, northeastern Argentina.
Zoologische Abhandlungen 56: 107-112

abstract (from publication):
Crenicichla yaha is described from the rio Iguazu and arroyo Urugua-I 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 E1 row, (3) isognathous jaws or slightly prognathous upper jaw, (4) presence suborbital stripe, (5) flanks with five or six dark rectangular blotches just below the upper lateral line along dorsal-fin base, and (6) lacking of vertical stripes.