Last modified: Jan. 14, 2021, 6:23 p.m.
Species ID has been confirmed by DNA barcoding of the larvae.
For the first time recorded from Belgium in 2018 and hitherto known only from WV.
Wingspan circa 5–6 mm.
The mines are indistinguishable from those of Ectoedemia haraldi and Ectoedemia pseudoilicis, therefore DNA barcoding of the larvae is necessary.
The larvae create a strong contorted gallery mine almost completely filled with black frass. Usually there are several, often many larvae mining a single leaf. Mines occur from November through to April.
Adults are rarely seen but fly in June and July.
Planted hedges with trees of Quercus ilex, botanical gardens where Quercus alnifoliae is planted.