''Andesiana brunnea'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the Andesianidae family. It is known from a single specimen from

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

(Isla Victoria, Nahuel Huapi Lake, Neuquen). The length of the forewings is about 12.4 mm, making it the smallest of the known ''

Andesiana ''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.Davis, D. ...

'' species. It has a generally dark reddish-brown vestiture. The forewing pattern is reduced to a well-defined, dark brown bar composed of erect dense scales at the end of the discal cell. The hindwings are almost denuded of scales, with scattered brown scales along margins and a darker bar along the end of the discal cell as in the forewing. The single specimen was caught in early October.

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Andesianidae, a new family of monotrysian moths (LepidopteraiAndesianoidea) from austral South America
Andesianidae Andesianidae of South America Fauna of the Andes Moths of South America {{moth-stub