(Figs 4F, 6D)
Material examined. Russia: PK, Gornotaezhnoe, forest around MTS, 43.68N, 132.15E, 224 m alt., Crataegus sp., 20.VII.2016, 1 pupa, NK543, MK 403717, deposited in INRA; same location, host and date, 1 male (reared from leaf mine), 41.1 / [14Pj-2016-male] (Figs 4F, 6D), deposited in SIF; SO, Sakhalin Island, Yuzhno-Sakhalinsk, BGIS, 47.05N, 142.74E, 57 m alt., C. chlorosarca, 12.VII.2017, 1 larva, NK627, MK 403683, deposited in INRA; same location, host and date, 2 males (reared from leaf mine), NK- 98-17-1 / [14-male], deposited in MSNV, NK- 98-17-1 / [23-male], deposited in SIF.
Leaf mine. The mine is a whitish slightly contracted blotch between the secondary veins on the lower side of the leaf. We recorded up to three mines per a leaf in RFE. Pupation in the mine.
Trophic specialization. Monophagous on Crataegus: C. chlorosarca, C. jozana, C. maximowiczii, C. pinnatifida (Rosaceae) (De Prins & De Prins 2018).
Distribution. Russia: RFE—KK, PK, SO (Sakhalin Island) (Baryshnikova & Dubatolov 2008; Baryshnikova 2008, 2016); Japan (Kumata 1967), Korea (Kim & Byun 2017).