Trimenia wallengrenii

{{Short description|Species of butterfly}}

{{Speciesbox

| name = Wallengren's copper

| status = EN

| status_system = IUCN2.3

| genus = Trimenia (butterfly)

| species = wallengrenii

| authority = (Trimen & Bowker, 1887)

| synonyms =

• Zeritis wallengrenii Trimen, 1887
• Phasis wallengrenii

| range_map = Trimenia wallengrenii, verspreiding.png

| range_map_caption = {{colorbull|#FF0E17|r||14}} Ranges of the two subspecies

|status_ref={{cite iucn |author=Gimenez Dixon, M. |date=1996 |title=Trimenia wallengrenii |volume=1996 |page=e.T22149A9363812 |doi=10.2305/IUCN.UK.1996.RLTS.T22149A9363812.en |access-date=16 November 2021}}

}}

Trimenia wallengrenii, the Wallengren's copper or Wallengren's silver-spotted copper, is a species of butterfly in the family Lycaenidae. It is endemic to South Africa.

The wingspan is 24–35 mm for males and 29–42 mm females. Adults are on wing from November to December. 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 }}