Duwal et al., 2013b (key Korean spp.); Konstantinov et al., 2016 (rev. spp. of Russia, Caucasus & Central Asia); Linnavuori, 1993b (key to African and Near East species); Schuh, 1984 (rev., Oriental species); Yasunaga et al., 2015 (Japanese species: distr., key, tax.).