Fauvel et al., 1987 (caliginosus, biol.); Foglar et al., 1990 (caliginosus, biol.); Heiss & J. Ribes, 1998; Martinez-Cascales et al., 2006 (tax.); Tamanini, 1981 (caliginosus). Distribution: Linnavuori & Modarres, 1999a (Iran); Carapezza, 2002a (Jordan); Frey et al., 2016 (Switzerland); Heckmann et al., 2015 (Crete); Matocq & Azar, 2023 (Lebanon).