Carapezza, 1997 (celatum); Goula, 1993; Konstantinov et al., 2016 (diagn., distr., figs, male genitalia).
Distribution: Drapolyuk, 2001 (Azerbaijan); Stănescu, 2001 (Romania); Aukema et al., 2002 (Belgium); B.Y. Qi et al., 2003 (China NO); Gillerfors & Coulianos, 2005 (Sweden); Linnavuori, 2007a (Iran); Rieger, 2007 (Greece); Pajač & Barić, 2009 (Croatia); Skipper, 2009 (Denmark); Söderman & Rintala, 2009 (Lithuania); Matocq & Özgen, 2010 (celatum: Asian Turkey); Rieger, 2012b (Russia: ES); ; Duwal et al., 2013b, 2016 (South Korea); Protić, 2014 (Serbia); Yasunaga et al., 2015 (Japan: Hokkaido).