Placostegus Philippi, 1844

Eoplacostegus zbyslavus Ziegler, 1984

Placostegus assimilis McIntosh, 1885

Placostegus benthalianus McIntosh, 1885

Placostegus californicus Hartman, 1969

Placostegus conchophilus Radwanska, 2004

Placostegus crystallinus sensu Zibrowius, 1968

Placostegus grayi Baird, 1865

Placostegus incomptus Ehlers, 1887

Placostegus laegerdorfensis Jager, 1983

Placostegus langerhansi Marenzeller, 1893

Placostegus moerchii McIntosh, 1885

Placostegus porosus (Daudin, 1800)

Placostegus proliferus (Goldfuss, 1831)

Placostegus rigidus (Regenhardt, 1961)

Placostegus tridentatus (Fabricius, 1779)

Placostegus violaceus (Quatrefages, 1866)