Rectiostoma fernaldella (stenomid oak leaf tier) is a species of moth in the family Depressariidae.
[3] Adults have been observed flying in shady areas under oaks during midday.
There is a single annual generation in California, with adults on wing in May, June and July.
The larvae utilize shelters made by the preceding generation for overwintering.
These shelters consist of two leaves sandwiched together with a thick rim of frass and silk sealing their edges.