Microlepidoptera (micromoths) is an artificial grouping of moth families, commonly known as the "smaller moths". These generally have wingspans of under 20 mm, so are harder to identify by external phenotypic markings than macrolepidoptera. They present some lifestyles that the larger Lepidoptera do not have, but this is not an identifying mark. Some hobbyists further divide this group into separate groups, such as leaf miners or rollers, stem or root borers, and then usually follow the more rigorous scientific taxonomy of lepidopterans. Efforts to stabilize the term have usually proven inadequate.
The Prodoxidae are a family of moths, generally small in size and nondescript in appearance. They include species of moderate pest status, such as the currant shoot borer, and others of considerable ecological and evolutionary interest, such as various species of "yucca moths".
Adeloidea is a superfamily of primitive monotrysian moths in the order Lepidoptera which consists of leafcutters, yucca moths and relatives. This superfamily is characterised by a piercing, extensible ovipositor used for laying eggs in plants. Many species are day-flying with metallic patterns.
Palaephatoidea is a superfamily of insects in the order Lepidoptera with a single family, Palaephatidae with seven known genera. These "Gondwanaland moths" exhibit a disjunct distribution occurring mainly in South America, with four species in eastern Australia and Tasmania and one in South Africa. The larvae spin together leaves of Proteaceae (Ptyssoptera) or Verbenaceae (Azaleodes) . Palaephatoidea, a typical monotrysian group, is one two main candidates as the sister group of most of the Lepidoptera, the Ditrysia.
Tischerioidea is the superfamily of "trumpet" leaf miner moths. The superfamily contains just one family, Tischeriidae, and traditionally one genus, Tischeria, but currently three genera are recognised, widespread around the world including South America, except for Australasia. This is one candidate as the sister group of the bulk of Lepidoptera, the Ditrysia, and they have a monotrysian type of female reproductive system. These small moths are leaf-miners in the caterpillar stage, feeding mainly on Fagaceae, Asteraceae, and Malvaceae (Astrotischeria), and some also on Rhamnaceae, Tiliaceae, and Rosaceae.
Nepticulidae is a family of very small moths with a worldwide distribution. They are characterised by eyecaps over the eyes. These pigmy moths or midget moths, as they are commonly known, include the smallest of all living moths, with a wingspan that can be as little as 3 mm in the case of the European pigmy sorrel moth, but more usually 3.5–10 mm. The wings of adult moths are narrow and lanceolate, sometimes with metallic markings, and with the venation very simplified compared to most other moths.
Incurvariidae is a family of small primitive monotrysian moths in the order Lepidoptera. There are twelve genera recognised. Many species are leaf miners and much is known of their host plants, excluding Paraclemensia acerifoliella. The most familiar species in Europe are perhaps Incurvaria masculella and Phylloporia bistrigella. The narrow wings are held tightly along the body at rest and some species have very long antennae.
The Adelidae or fairy longhorn moths are a family of monotrysian moths in the lepidopteran infraorder Heteroneura. The family was first described by Charles Théophile Bruand d'Uzelle in 1851. Most species have at least partially metallic patterns coloration and are diurnal, sometimes swarming around the tips of branches with an undulating flight. Others are crepuscular and have a drab coloration. Fairy longhorn moths have a wingspan of 4–28 millimeters, and males often have especially long antennae, 1–3 times as long as the forewing.
Cecidosidae is a family of primitive monotrysian moths in the order Lepidoptera which have a piercing ovipositor used for laying eggs in plant tissue in which they induce galls, or they mine in bark. Nine species occur in southern Africa, five species in South America and Xanadoses nielseni was recently described from New Zealand. Some minute parasitoid wasps are known.
Carposinidae, the "fruitworm moths", is a family of insects in the order Lepidoptera. These moths are narrower winged than Copromorphidae, with less rounded forewing tips. Males often have conspicuous patches of scales on either surface. The mouthparts are quite diagnostic, usually with prominent, upcurved "labial palps", the third segment long, and the second segment covered in large scales. Unlike Copromorphidae, the "M2" and sometimes "M1" vein on the hindwings is absent. The relationship of Carposinidae relative to Copromorphidae needs further investigation. It is considered possible that the family is artificial, being nested within Copromorphidae. The Palearctic species have been revised by Alexey Diakonoff (1989).
Choreutidae, or metalmark moths, are a family of insects in the lepidopteran order whose relationships have been long disputed. It was placed previously in the superfamily Yponomeutoidea in family Glyphipterigidae and in superfamily Sesioidea. It is now considered to represent its own superfamily. The relationship of the family to the other lineages in the group "Apoditrysia" need a new assessment, especially with new molecular data.
Crinopteryx is a monotypic genus of primitive monotrysian moths. Its sole species, Crinopteryx familiella, is endemic to Europe, where it is restricted to the Mediterranean region of France, Italy, the Iberian Peninsula and Sicily. Crinopteryx used to be classified in its own, monotypic family called Crinopterygidae, but the latter has been downgraded to a subfamily (Crinopteryginae) of the family Incurvariidae.
A family of primitive monotrysian moths in the order Lepidoptera, Heliozelidae are small, metallic day-flying moths with shiny smooth heads. In Europe the small adult moths are seldom noticed as they fly quite early in the spring. The larvae are leaf miners and the vacated leaf mines are distinctive because the larva leaves a large hole at the end.
Opostegidae or "white eyecap moths" is a family of insects in the order Lepidoptera that is characterised by particularly large eyecaps over the compound eyes. Opostegidae are most diverse in the New World tropics.
Andesiana is a genus representing its own family Andesianidae and superfamily Andesianoidea, the "Andean endemic moths". It contains three species with a wingspan up to 5.4 cm. in female A. similis and 3.5 cm. in males. This far surpasses in size any previously known monotrysian moth. These large Microlepidoptera are restricted to Andean South America, from where they were described originally in 1989 in the family Cossidae by their discoverer Patricia Gentili.
Stigmella microtheriella is a moth of the family Nepticulidae, found in Asia, Europe and New Zealand. The larvae mine the leaves of hazel and hornbeams. It was described by the English entomologist, Henry Tibbats Stainton in 1854 from a type specimen found in England.
Stigmella oxyacanthella is a moth of the family Nepticulidae, found in Europe and North America. The larvae are leaf miners feeding inside the leaves of trees and shrubs, such as hawthorn, apple and pear.
Stigmella lapponica is a moth of the family Nepticulidae found in Asia, Europe and North America. It was first described by the German entomologist, Maximilian Ferdinand Wocke in 1862. The larvae mine the leaves of birch.
Stigmella crataegella is a moth of the family Nepticulidae found in Europe. It was described by the Austrian entomologist Josef Wilhelm Klimesch in 1936. The larvae mine the leaves of hawthorns.
Stigmella perpygmaeella is a moth of the family Nepticulidae, found in most of Europe, east to Russia. The larvae mine the leaves of hawthorns.
