Australoheros kaaygua sp. n. is described from the río Iguazú basin above Iguazú falls. Australoheros kaaygua sp. n. is distinguished from its congeners by the following combination of characters: 5–6 anal-ﬁ n spines; 6–7 branched anal-ﬁn rays; caudal-peduncle length 8.9–11.8 % of SL; lips not thickened; lateral band formed by two series of scales, each of them with a dark spot in its centrum. Between both scales there is a narrow light area; dorsal, anal, caudal ﬁns and opercle without dark spots.
Key words. Perciformes, Cichlidae, systematics, Australoheros, new species, Argentina, río Iguazú
Almirón & Gómez. 2006. A new species of Australoheros (Teleostei: Perciformes: Cichlidae) from the río Iguazú basin, Argentina. Zoologische Abhandlungen (Dresden). 55 : 77–83