Höregott & Jordan, 1954 (female characters); Jansson, 1969 (descr. larvae), 1979a (exp. hybr.), 1980 (distr. hist.), 1986a; Jansson & Pajunen, 1978 (morphometry); Kerzhner & Jaczewski, 1964; Savage, 1989. Distribution: Štys, 1976b (Czech Republic); A. Gogala & M. Gogala, 1989 (Slovenia); Protić, 1998a (Bosnia Hercegovina Macedonia); Kment et al., 2005a (Montenegro); Aukema et al., 2007c (Ireland).