O.albus (Valeciennes, 1846)
O.ascotanensis (Parenti, 1984)
O.chungarensis (Vila & Pinto, 1987)
O.crawfordi (Tchernavin, 1944)
O.ctenolepis (Parenti, 1984)
O.cuvieri (Valeciennes, 1846)
O.elegans (Garman, 1895)
O.empyraeus (Allen, 1942)
O.forgeti (Lauzanne, 1981)
O.frontosus (Cope, 1876)
O.gilsoni (Tchernavin, 1944)
O.gracilis (Parenti, 1984)
O.gloriae (Vila, Scott, Mendez, Valenzuela, Iturra & Poulin, 2012)
O.gymnotus (Parenti, 1984)
O.hardini (Parenti, 1984)
O.imarpe (Parenti, 1984)
O.incae (Garman, 1895)
O.ispi (Lauzanne, 1981)
O.jussiei (Valeciennes, 1846)
O.lastarriae (Philippi, 1876)
O.laucaensis (Arratia, 1982)
O.luteus (Valeciennes, 1846)
O.minimus (Tchernavin, 1944)
O.minutus (Tchernavin, 1944)
O.mooni (Tchernavin, 1944)
O.mulleri (Valenciennes, 1846)
O.multiporis (Parenti, 1984)
O.mundus (Parenti, 1984)
O.olivaceus (Garman, 1895)
O.parinacotensis (Arratia, 1982)
O.pentlandii (Valeciennes, 1846)
O.piacotensis (Vila, 2006)
O.polonorum (Tchernavin, 1944)
O.puni (Tchernavin, 1944)
O.richersoni (Parenti, 1984)
O.robustus (Parenti, 1984)
O.silustani (Allen, 1942)
O.taquiri (Tchernavin, 1944)
O.tchernavini (Lauzanne, 1981)
O.tomocooni (Parenti, 1984)
O.tschudii (Castelnau, 1855)
O.tutini (Tchernavin, 1944)
O.uruni (Tchernavin, 1944)
O.ututo (Parenti, 1984)
