Petasanthes is a monotypic moth genus in the family Depressariidae.

The forewings are deep orange with the costa narrowly black towards the base, from before one-third with a gradually expanded black marginal band widest opposite the apex, where it occupies one-third of the wing, and then rather narrowed along the termen to below the tornus, cut by whitish streaks on all veins.

The hindwings are orange, with a small blackish spot on the transverse vein, and a moderately broad blackish border cut by indistinct orange lines on the veins around the apex and upper three-fourths of the termen.

There is some blackish irroration (sprinkling) towards the dorsum and tornus and sometimes the orange area is almost wholly suffused with blackish, except the costal area from near the base to three-fourths.

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