(Figs 4M, 8D)
Material examined. Russia: PK, Gornotaezhnoe, MTS, 43.69N, 132.15E, 152 m alt., 22.VII.2016, 1 male (collected by sweep netting from Aesculus hippocastanum), 37.1 / [15Pu-2016-male] (Figs 4M, 8D); SO, Sakhalin Island, Yuzhno-Sakhalinsk, Gagarin Park, 46.96N, 142.75E, 69 m alt., Betula platyphylla, 11.VII.2017, 1 female (reared from leaf mine), NK- 66-17-1 / [17-female], deposited in SIF.
Leaf mine. The mine is indistinguishable from the one of Ph. ermani on Betula platyphylla (Fig. 12B). Pupation in the mine.
Trophic specialization. Monophagous on Betula: B. nigra, B. papyrifera, B. pendula, B. platyphylla, B. pubescens (Betulaceae) (De Prins & De Prins 2018).
Distribution. Russia: RFE—AO, KK, PK, SO (Kuril Islands) (Baryshnikova & Dubatolov, 2007; Baryshnikova 2016), SO (Sakhalin Island) (new record), Siberia, European part (Baryshnikova 2008; Kirichenko et al. 2017a); Japan (Kumata 1963), Kazakhstan (Kuznetsov & Baryshnikova 1998), Europe (De Prins & De Prins 2018).