Duwal & Lee, 2015 (key Korean spp.); Duwal et al., 2012a (key Korean species); Pluot-Sigwalt & Matocq, 2017 (female genitalia, taxonomy); Wagner, 1966h (disc., outdated); Wyniger, 2004 (rev. Central European spp., key, phyl., tax.); Yasunaga & Vinokurov, 2000 (Japanese spp., biol., figs, key).