Thestor brachycerus

{{Short description|Species of butterfly}}

{{Speciesbox

| name = Knysna skolly

| image = Thestor brachycerus subsp dukei, J Dobson, a.jpg

| image_caption = Thestor brachycerus subsp. dukei

| status = LC

| status_system = IUCN3.1

| taxon = Thestor brachycerus

| authority = (Trimen, 1883)

| synonyms =

• Arrugia brachycera Trimen, 1883
• Thestor dukei van Son, 1951

|status_ref={{cite iucn |author=Edge, D.A.|author2=Pringle, E.L. |author3=Patel, T. |author4=Van Der Colff, D. |date=2022 |title=Thestor brachycerus |volume=2022 |page=e.T21751A165245662 |url=https://www.iucnredlist.org/species/21751/165245662 |access-date=29 December 2022}}

}}

Thestor brachycerus, the Knysna skolly, is a species of butterfly in the family Lycaenidae. It is endemic to South Africa.

The wingspan is 27–36 mm for males and 29–39 mm for females. Adults are on the wing from December to January. There is one generation per year.{{cite book|last=Woodhall |first=Steve |title=Field Guide to Butterflies of South Africa |year=2005 |location=Cape Town, South Africa |publisher=Struik |isbn=978-1-86872-724-7 }}

Larvae have been found in the nests of the pugnacious ant, Anoplolepis custodiens, but the larval food is unknown.