Cimex filicis Linnaeus, 1758: 443. ST(S): Sweden; LSUK?
Monalocoris filicis var. atlantica Lindberg, 1941b: 15 (upgraded to subspecies by Stichel, 1956: 197; downgraded by Wagner & Weber, 1964: 30). LT (Huldén et al., 1996: 95): male, Azores, Flores Is., Santa Cruz; MZHF.
Monalocoris japonensis Linnavuori, 1961c: 164 (syn. Kerzhner, 1978: 37). STS: male, female, Japan, Kyushu, Abura-yama nr Fukuoka; AMNH, KUEC?