The genus
Spalax contains the
blind,
fossorial, or
subterranean mole-rats, which are one of several types of
rodents that are called mole-rats. The
hystricognath mole-rats of the family
Bathyergidae are completely unrelated, but some other forms are also in the family
Spalacidae.
Zokors (subfamily
Myospalacinae) and root rats and
bamboo rats (subfamily
Rhizomyinae) are spalacids sometimes referred to as mole-rats. Blind mole-rats are in the
family Spalacidae, but are unique enough to be given a separate
subfamily,
Spalacinae. Alternate opinions on
taxonomy consider the blind mole-rats to be the only members of the family
Spalacidae and rank other spalacid subfamilies as full families. Other authors group all members of the
superfamily Muroidea into a single family,
Muridae. The Spalacinae contains two
genera and eight
species. Some authorities treat all species as belonging to a single genus,
Spalax.