A genus, currently with four species, all confined to south-eastern Australia.
Evidence from larval fish studies (Trnski et al. 2005) and molecular phylogenetic analyses (Jerry et al. 2001; Near et al. 2012) indicate that the two catadromous species, M. colonorum and M. novemaculeata, are more closely related to species in the genus Maccullochella and belong to a genus separate from teh two freshwater species of Macquaria (M. ambigua and M. australasica).
Allen, G.R. 1989. Freshwater Fishes of Australia. Neptune, New Jersey : T.F.H. Publications 240 pp., 63 pls
Allen, G.R., Midgley, S.H. & Allen, M. 2002. Field Guide to the Freshwater Fishes of Australia. Perth : Western Australian Museum 394 pp.
Harris, J.H. & Rowland, S.J. 1996. Family Percichthyidae. pp. 150-163 in McDowall, R.M. (ed.). Freshwater Fishes of South-eastern Australia. Sydney : Reed Books 247 pp.
Jerry, D.R., M.S. Elphinstone & P.B. Baverstock. 2001. Phylogenetic relationships of Australian members of the family Percichthyidae inferred from mitochondrial 12s rRNA sequence data.Mol. Phylog. Evol. 18: 335−347.
MacDonald, C.M. 1978. Morphological and biochemical systematics of Australian freshwater and estuarine percichthyid fishes. Australian Journal of Marine and Freshwater Research 29(5): 667-698 figs 1-11
Merrick, J.R. & Schmida, G.E. 1984. Australian Freshwater Fishes Biology and Management. Sydney : J.R. Merrick 409 pp. figs 280 col. figs
Near, T.J., Sandel, M., Kuhn, K.L., Unmack, P.J. Wainwright, P.C., & Smith, W.L. 2012. Nuclear gene-inferred phylogenies resolve the relationships of the enigmatic Pygmy Sunfishes, Elassoma (Teleostei: Percomorpha). Molecular Phylogenetics and Evolution 63: 388-395.
Trnski, T., Hay, A.C. & Fielder, D.S. 2005. Larval development of estuary perch (Macquaria colonorum) and Australian bass (M. novemaculeata) (Perciformes: Percichthyidae), and comments on their life history. Fishery Bulletin 103: 183-194. pdf