Trionymus aberrans
Trionymus acomus
Trionymus agrestis
Trionymus agropyronicola
Trionymus americanus (American grass mealybug)
Trionymus angustifrons
Trionymus apoxys <Unverified Name>
Trionymus aristidae
Trionymus arnicae
Trionymus artemisiarum
Trionymus ascripticius
Trionymus bambusae
Trionymus bocheri
Trionymus boratynskii
Trionymus calamagrostidis
Trionymus cambodiensis
Trionymus cantonensis
Trionymus caricis (carex mealybug)
Trionymus ceres (cereal mealybug)
Trionymus circulus
Trionymus clandestinis
Trionymus claviger
Trionymus cogonicola <Unverified Name>
Trionymus copiosus
Trionymus coronus
Trionymus cressae
Trionymus cynodontis <Unverified Name>
Trionymus dactylis
Trionymus dactyloctenii
Trionymus dagestanicus
Trionymus demertor
Trionymus dilatatus
Trionymus dolus (dolus mealybug)
Trionymus elymus
Trionymus faratsi
Trionymus ferganensis
Trionymus festucae (north coast mealybug)
Trionymus formosanus
Trionymus frontalis (frontal grass mealybug)
Trionymus gyrus
Trionymus haancheni (Haanchen barley mealybug)
Trionymus hamberdi (Hamberd's mealybug)
Trionymus hypoestis
Trionymus idahoensis
Trionymus implicatus
Trionymus inaequalis
Trionymus incertus
Trionymus insularis
Trionymus interjecti
Trionymus internodii
Trionymus inyazurae
Trionymus iridis
Trionymus isfarensis (Tadzhik mealybug)
Trionymus jonesi
Trionymus kirgisicus
Trionymus kobotokensis
Trionymus kurilensis
Trionymus lanatus
Trionymus latus
Trionymus latvicus
Trionymus levis (aberrant mealybug)
Trionymus longipilosus
Trionymus longissimus
Trionymus lowryi (Lowry mealybug)
Trionymus lumpurensis
Trionymus magnus (magnus mealybug)
Trionymus masrensis
Trionymus mocus (mocker grass mealybug)
Trionymus modocensis (modoc grass mealybug)
Trionymus mongolicus
Trionymus mori
Trionymus multisetiger
Trionymus multivorus (polyphagous mealybug)
Trionymus myersi (Myers mealybug)
Trionymus myrmecarius
Trionymus nanus
Trionymus newsteadi (beech mealybug)
Trionymus nicotianacola
Trionymus nudus
Trionymus oblongus
Trionymus okiensis
Trionymus orestes
Trionymus orientalis
Trionymus paludicola
Trionymus parvaster
Trionymus perrisii
Trionymus petiolicola
Trionymus phalaridis (canarygrass mealybug)
Trionymus phragmiticola <Unverified Name>
Trionymus phragmitis (Hall's Reed mealybug)
Trionymus pietranerae
Trionymus pilosus
Trionymus placatus (pleasant grass mealybug)
Trionymus plurostiolatus
Trionymus polyporus
Trionymus prolatus
Trionymus quadricirculus (square circulus mealybug)
Trionymus radicicola
Trionymus radicum (thrift root mealybug)
Trionymus refertus
Trionymus rhizophilus
Trionymus rotundatus
Trionymus sasae
Trionymus sativus
Trionymus smithii (Smith grass mealybug)
Trionymus strongylus
Trionymus subterraneus (root mealybug)
Trionymus summus <Unverified Name>
Trionymus tangi <Unverified Name>
Trionymus tasmanianus
Trionymus terranora
Trionymus themedae
Trionymus thulensis (northern mealybug)
Trionymus tomlini (guernsey grass mealybug)
Trionymus townesi
Trionymus turgidus
Trionymus utahensis (Utah grass mealybug)
Trionymus vaginatus
Trionymus violascens (dusky grass mealybug)
Trionymus williamsi
Trionymus winnemucae (Winnemuca grass mealybug)
Trionymus yaelae
Trionymus zebedielae
Trionymus zoysiae