Peritornenta thyellia is a moth in the family Depressariidae.

It is found in Australia, where it has been recorded from Queensland and New South Wales.

The forewings are pale flesh color with numerous more or less distinct dark fuscous dots, arranged in irregular transverse series.

The hindwings are whitish ochreous or pale yellowish, generally more or less fuscous tinged.

This article on a moth of the subfamily Depressariinae is a stub.