Pamphilius itoi Shinohara, 1985

(Figs 87, 88) (https://doi.org/10.6084/m9.figshare.11405211)

Pamphilius itoi Shinohara, 1985b: 454; Shinohara & Hara 1995: 572; Zhelochovtsev & Zinovjev, 1995: 397; Shinohara, 2002a: 190; Shinohara, 2002b: 428; Shinohara, 2004: 264; Shinohara & Hara, 2005: 275; Shinohara & Lelej, 2007: 934, 942; Sundukov, 2009: 213; Taeger et al., 2010: 88; Sundukov & Lelej, 2012: 109; Sundukov, 2015: 249; Sundukov, 2017: 105; Shinohara, 2019: 10; Shinohara, 2020: 18, 248.

Material examined. About 1610 specimens, including the type series, all from Japan . No specimens were available from the Russian Far East and Korea.

Distribution. Russia (Primorskij Kraj), Japan (Hokkaido, Kunashiri Is., Honshu) (Sundukov 2009).

Host plant. Betulaceae: Alnus hirsuta (Spach) Turcz. ex Rupr., Alnus japonica (Thunb.) Steud. (Shinohara & Hara 1995, 2005).

Remarks. This species is often commonly found in Hokkaido, Japan (1436 Japanese specimens recorded by National Museum of Nature and Science 2021), but only two females have been recorded from the continent (Primorskij Kraj, Russia, by Sundukov 2009). We have seen no specimens of this species from outside Japan.

In the molecular analysis using COI and NaK (Figs 149, 160), the specimens of this species (all from Japan) were retrieved as a clade belonging to a complex of rather poorly resolved Alnus - and Betula -feeding species of the P. vafer group, such as P. alnivorus, P. confusus, P. flavipectus Shinohara, 2005, P. masao, P. nakagawai, P. pallipes, P. archiducalis and P. varius (Serville, 1823) .