Hybridization and morphological characteristics of forms in the microtus juldaschi and microtus carruthersi groups
Bol'shakov, V.N.; Pokrovskii, A.V.; Kuznetsova, I.A.; Vasil'eva, I.A.; Kourova, T.P.
Zoologicheskii Zhurnal 61(11): 1726-1734
Complex studies of M. juldaschi and M. carruthersi from several regions of their range [USSR] show that interrelations of forms within this group are much more complicated than was considered until now. These species seem to be in the process of differentiation and may represent forms at different stages of species formation.