Péricart, 1999a; Safwat et al., 2022 (egg morphology); J.A. Slater, 1964a (Spilostethus); Zheng & Zou, 1981a.
Distribution: Tolsgaard & Jensen, 2010 (Faeroe Isles, not established); Protić, 2001a (Serbia); Linnavuori et al., 2014b (Arab Emirates Oman); Heckmann et al., 2015 (Crete); Kaunang, 2016 (Great Britain); Aukema, 2020 (Netherlands); Baymak & Kıyak, 2001 (Kosovo); Nelson, 2019 (Ireland).