O.fugitiva (Fowler, 1913)
O.dialeptura (Fink & Weitzman, 1974)
O.dierythrura (Fowler, 1940)
O.ecuadorensis (Bührnheim & Malabarba, 2006)
O.gracilis (Géry, 1960)
O.littoris (Géry, 1960)
O.microcephala (Eigenmann, 1907)
O.mitoptera (Fink & Weitzman, 1974)
O.nareuda (Bührnheim & Malabarba, 2006)
O.pacaasnovosa Chuctaya, Ohara & Malabarba, 2020
O.pao (Bührnheim & Malabarba, 2007)
O.paraguaensis (Eigenmann & Kennedy, 1903)
O.parecis (Bührnheim & Malabarba, 2006)
O.pequira (Steindachner, 1882)
O.pulchra (Gill, 1858)
O.roloffi (Géry, 1972)
O.splendida (Bührnheim & Malabarba, 2007)
O.stenodon (Eigenmann, 1915)
O.weitzmani Chuctaya, Buhrnheim & Malabarba, 2018
