''Sesommata holocapna'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

of the family

Palaephatidae 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 (Davis, 1986), with fo ...

. It was described by

Edward Meyrick Edward Meyrick (25 November 1854 – 31 March 1938) was an English schoolmaster and amateur entomologist. He was an expert on microlepidoptera and some consider him one of the founders of modern microlepidoptera systematics. Life and work Ed ...

in 1931.Davis, Donald R
"A New Family of Monotrysian Moths from Austral South America (Lepidoptera: Palaephatidae), with a Phylogenetic Review of the Monotrysia"
It is found in the temperate Valdivian forest region of southern

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

and

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

. The length of the forewings is 5–6.5 mm for males and 6–7 mm for females. Adult males have dark fuscous forewings and a rounded mass of broad sex scales. The forewings of the females are slightly lighter in colour and often sprinkled with white over the distal half. Adults are on wing from November to January in one generation per year. The larvae feed on '' Diostea juncea''.

References

Moths described in 1931 Palaephatidae {{Palaephatoidea-stub