Jaczewski, 1929 (redescr. as S. assimilis and S. fussi); Jansson, 1986a; Kerzhner & Jaczewski, 1964.
Distribution
Jorrigtoo et al., 1996 (China NW); Hayashi et al., 2001 (Japan); Zaika, 2007 (Russia: ES); Fent et al., 2011 (Asian Turkey); Linnavuori et al., 2011 (Arab Emirates); Ghahari et al., 2013a (Iran); Sowa et al., 2018 (Poland).