Trionymus Berg, 1899

Trionymus acomus De Lotto, 1964

Trionymus agrestis Wang & Zhang, 1990

Trionymus agropyronicola Tang, in Tang & Li, 1988

Trionymus americanus (Cockerell, 1899)

Trionymus angustifrons Hall, 1926

Trionymus aristidae Williams, 1985

Trionymus arnicae Siraiwa, 1939

Trionymus artemisiarum (Borchsenius, 1949)

Trionymus ascripticius Williams, 1985

Trionymus bambusae (Green, 1922)

Trionymus boratynskii Danzig, 1983

Trionymus calamagrostidis (Borchsenius, 1949)

Trionymus cambodiensis Takahashi, 1942

Trionymus cantonensis Ferris, 1954

Trionymus caricis McConnell, 1941

Trionymus ceres Williams, 1970

Trionymus circulus Tang in Tang & Li, 1988

Trionymus clandestinis McConnell, 1941

Trionymus claviger (King & Tinsley, 1897)

Trionymus copiosus (Borchsenius, 1949)

Trionymus coronus Miller & McKenzie, 1971

Trionymus cressae (Hall, 1927)

Trionymus dactylis (Green, 1925)

Trionymus dactyloctenii Mamet, 1943

Trionymus dagestanicus Danzig, 1998

Trionymus danzigae (Kozar & Kosztarab, 1976)

Trionymus demertor De Lotto, 1964

Trionymus dilatatus Danzig, 1971

Trionymus dolus Ferris, 1950

Trionymus faratsi Mamet, 1962

Trionymus ferganensis (Borchsenius, 1949)

Trionymus festucae (Kuwana, 1901)

Trionymus formosanus Takahashi, 1930

Trionymus frontalis McKenzie, 1967

Trionymus gyrus Williams, 1985

Trionymus haancheni McKenzie, 1960

Trionymus hamberdi (Borchsenius, 1949)

Trionymus hypoestis (James, 1935)

Trionymus idahoensis Miller & McKenzie, 1971

Trionymus implicatus (Borchsenius, 1949)

Trionymus inaequalis (James, 1935)

Trionymus incertus Green, 1931

Trionymus insularis Ehrhorn, 1916

Trionymus interjecti Bueker, 1931

Trionymus internodii (Hall, 1923)

Trionymus inyazurae Hall, 1937

Trionymus iridis Danzig, 1971

Trionymus isfarensis (Borchsenius, 1949)

Trionymus kirgisicus (Borchsenius, 1949)

Trionymus kobotokensis Kanda, 1959

Trionymus kurilensis Danzig, 1986

Trionymus lanatus (Balachowsky, 1932)

Trionymus latus Takahashi, 1929

Trionymus latvicus (Rasina, 1966)

Trionymus levis Tang, 1992

Trionymus longipilosus De Lotto, 1961

Trionymus longissimus De Lotto, 1964

Trionymus lowryi Brachman & Kosztarab in Kosztarab, 1996, 1996

Trionymus lumpurensis Takahashi, 1951

Trionymus magnus (Cockerell, 1901)

Trionymus masrensis Hall, 1925

Trionymus mocus Ferris, 1953

Trionymus modocensis (Ferris, 1953)

Trionymus mongolicus Danzig, 1980

Trionymus mori Lobdell, 1930

Trionymus multisetiger (Borchsenius, 1949)

Trionymus multivorus (Kiritchenko, 1936)

Trionymus myersi McKenzie, 1961

Trionymus myrmecarius (Leonardi, 1908)

Trionymus nanus Cockerell, 1905

Trionymus newsteadi (Green, 1917)

Trionymus nicotianacola Williams & Granara de Willink, 1992

Trionymus nudus (James, 1935)

Trionymus oblongus De Lotto, 1964

Trionymus orestes Williams, 1962

Trionymus orientalis (Maskell, 1898)

Trionymus paludicola (Rasina, 1966)

Trionymus parvaster Danzig, 1971

Trionymus perrisii (Signoret, 1875)

Trionymus petiolicola (Morrison, 1922)

Trionymus phalaridis (Green, 1925)

Trionymus phragmitis (Hall, 1923)

Trionymus pietranerae Goux, 1941

Trionymus pilosus Goux, 1941

Trionymus placatus (Borchsenius, 1949)

Trionymus plurostiolatus Borchsenius, 1962

Trionymus polyporus Hall, 1924

Trionymus prolatus De Lotto, 1964

Trionymus pseudoperisii (Rasina, 1971)

Trionymus quadricirculus McKenzie, 1967

Trionymus radicicola (Morrison, 1926)

Trionymus radicum (Newstead, 1895)

Trionymus rhizophilus De Lotto, 1964

Trionymus rotundatus (James, 1935)

Trionymus sasae (Kanda, 1935)

Trionymus sativus James, 1936

Trionymus smithii (Essig, 1910)

Trionymus strongylus Miller & McKenzie, 1971

Trionymus subterraneus (Newstead, 1893)

Trionymus tasmanianus Williams, 1985

Trionymus terranora Williams, 1985

Trionymus themedae (James, 1936)

Trionymus thulensis Green, 1931

Trionymus tomlini (Green, 1925)

Trionymus townesi Beardsley, 1966

Trionymus turgidus (Borchsenius, 1949)

Trionymus utahensis (Cockerell, 1916)

Trionymus vaginatus Matesova, 1968

Trionymus violascens Cockerell, 1913

Trionymus williamsi Ezzat, 1959

Trionymus winnemucae McKenzie, 1967

Trionymus yaelae Bodenheimer, 1943

Trionymus zebedielae De Lotto, 1964