Only five species of Sepsidae have been described based on fossil material:
Protorygma electricum Hennig 1965 (Baltic amber, Russia)
Sepsis atra Statz 1940 (Rott Formation, Germany)
Sepsis bicolorata Statz 1940 (Rott Formation, Germany)
Sepsis ignobilis Statz 1940 (Rott Formation, Germany)
Themira saxifica Melander 1949 (Florissant Formation, Colorado, North America)
