Twinnia Stone & Jamnback, 1955

Twinnia cannibora Ono, 1977

Twinnia hirticornis Wood, 1978

Twinnia hydroides Novak, 1956

Twinnia japonensis Rubtsov, 1960

Twinnia magadensis Rubtsov, 1973

Twinnia nova (Dyar & Shannon, 1927)

Twinnia sedecimfistulata Rubtsov, 1955

Twinnia subtibbelesi Ono, 1980

Twinnia tatrensis Novak, 1959