Peritornenta thyellia is a moth in the family Depressariidae. It was described by Edward Meyrick in 1902. It is found in Australia, where it has been recorded from Queensland and New South Wales.[1]
The wingspan is 16–18 mm. The forewings are pale flesh color with numerous more or less distinct dark fuscous dots, arranged in irregular transverse series. There is an indistinct pre-tornal spot of grey suffusion. The hindwings are whitish ochreous or pale yellowish, generally more or less fuscous tinged.[2]