Heteroneura is a natural group (or clade) in the insect order Lepidoptera that comprises over 99% of all butterflies and moths.

[1] This is the sister group of the infraorder Exoporia (swift moths and their relatives),[2] and is characterised by wing venation which is not similar or homoneurous[3] in both pairs of wings.

Though basal groups within the Heteroneura cannot be identified with much confidence,[4] one major subgroup is the leaf-mining Nepticuloidea.

Species in this subgroup include some of the smallest lepidopterans identified.

[5] This Heteroneura-related article is a stub.