''Beltheca oni'' 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 family Gelechiidae. It was described by Kawahara and Adamski in 2006. It is found in

Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...

. The length of the forewings is 3.5-4.6 mm. The forewings are dark bronze, with short, narrow scales along the swollen base of the subcosta and radius. The hindwings are dark brown. Adults of both sexes dance in circles on the surface of different kinds of leaves. When dancing, the moth secures one of its forelegs as a pivot while shuffling the other legs laterally so that it can run rapidly in a circle. This behavior may mimic the movement of salticid jumping spiders, but may be associated with courtship.Proc. ent. Soc. Wash. 108 (2) : 254
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References

Moths described in 2006 Anacampsinae {{Anacampsinae-stub