Described as
Rheosmittia species B Cranston and Saether, 1986a: p. 48
Synonymy
Parakiefferiella (Rheosmittia) languida Brundin, 1956a: p. 153 pro parte, figs. 120-121 (pupa)
Note: Pupal material of Parakiefferiella (Rheosmittia) languida according to Brundin, 1956a, but deemed more likely to be that of Rh. halvorseni Cranston & Saether by Cranston and Saether, 1986a, but halvorseni has been shown (Tuiskunen and Lindeberg, 1986a) to be a Krenosmittia.