Teleiodes luculella, the crescent groundling, is a moth of the family Gelechiidae. It is found from Europe to the southern Ural and Transcaucasia.[1] The habitat consists of woodlands, including oak woodlands.[2]
The wingspan is 9–13 mm.[3] The head is white, mixed with black. Terminal joint of palpi shorter than second. Forewings are dark grey, mixed with black; some indistinct whitish spots towards base; a semicircular white costal blotch before middle, enclosing a blackish costal mark, and posteriorly suffused with yellow-ochreous in disc; a small whitish tornal spot, and a larger one on costa opposite. Hindwings under 1,grey. The larva is whitish green; dots black; head yellow-brown; plate of 2 yellow brown, black-marked[4]
Adults are on wing from May to June.
The larvae feed on Quercus, Castanea sativa, Betula, Acer and Salix eleagnos.[5]