''Thoressa decorata'', the decorated ace, is a

butterfly Butterflies are winged insects from the lepidopteran superfamily Papilionoidea, characterized by large, often brightly coloured wings that often fold together when at rest, and a conspicuous, fluttering flight. The oldest butterfly fossi ...

belonging to the family

Hesperiidae Skippers are a group of butterflies placed in the family Hesperiidae within the order Lepidoptera (moths and butterflies). They were previously placed in a separate superfamily, Hesperioidea, but have since been placed in the superfamily Papilion ...

. It was first described by

Frederic Moore Frederic Moore FZS (13 May 1830 – 10 May 1907) was a British entomologist and illustrator. He produced six volumes of ''Lepidoptera Indica'' and a catalogue of the birds in the collection of the East India Company. It has been said that Mo ...

in 1881 and is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Sri Lanka Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...

in the

Indomalayan realm The Indomalayan realm is one of the eight biogeographic realms. It extends across most of South and Southeast Asia and into the southern parts of East Asia. Also called the Oriental realm by biogeographers, Indomalaya spreads all over the Ind ...

. Seitz, A., 1912-1927. ''Die Indo-Australien Tagfalter Grossschmetterlinge Erde'' 9

References

e Butterflies described in 1881 Butterflies of Sri Lanka Taxa named by Frederic Moore {{Hesperiinae-stub