Original and used names: Phronia mutabilis Dziedzicki, 1889:477.
Swedish sources: Phronia mutabilis: Plassmann 1976c:78 [LU]; Plassmann 1979:384 [LU]; Hackman et al. 1988:285 [Sweden]; Chandler (2005) [Sweden]; Phronia mutabilis: Kjærandsen et al. 2007:91 [Boreal — •VB•LU•].
World distribution: Holarctic; widely distributed in Europe but not known from the eastern Palaearctic Region.