O.acutirostris (Menezes, 1987)
O.amome Almiron an. all, 2018
O.argenteus (Gьnther, 1864)
O.bolivianus (Fowler, 1940)
O.brevioris (Menezes, 1987)
O.hepsetus (Cuvier, 1829)
O.jacuiensis (Menezes & Ribeiro, 2010)
O.jenynsii (Gьnther, 1864)
O.itau (Mirande, Aguilera & Azpelicueta, 2011)
O.longirostris (Menezes & Gйry, 1983)
O.macrolepis (Steindachner, 1877)
O.menezesi (Miquelarena & Protogino, 1996)
O.oligolepis (Steindachner, 1867)
O.paranensis (Menezes & Gйry, 1983)
O.perdido (Ribeiro, Cavallaro & Froehlich, 2007)
O.pintoi (Amaral Campos, 1945)
O.planaltinae (Menezes & Gйry, 1983)
O.robustus (Menezes, 1969)
O.schindleri (Menezes & Gйry, 1983)
O.solitarius (Menezes, 1987)
O.varii Menezes & Ribeiro, 2015
