The Arran Carpet (Chloroclysta concinnata) is a species of moth in the Geometridae family.
This species is found only in North-West Scotland, including the Outer Hebrides. Though possibly a seperate species, it is possible that this species is a subspecies or form of the Common Marbled Carpet. This species is slightly smaller, and the outer crossband is more irregular. Very similar to darker forms of Common Marbled Carpet. Also very similar to the Dark Marbled Carpet. This species is classed as Nationally Scarce A in Britain.