Spinulum subarcticum (V.N. Vassiljev) ) A. Haines

Spinulum subarcticum (V.N. Vassiljev) ) A. Haines is a synonym sensu Hassler, 2014-2024+ of:

Spinulum annotinum subsp. dubium (Zoëga) J.H. Xue, Chepinoga & K.P. Ma, an accepted subspecies name sensu Hassler, 2014-2024+.