the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amniota (no rank)
Mammalia (class)
Eutheria (superorder)
Rodentia (order)
Sciurognathi (suborder)
Sciuridae (family)
Spermophilus (genus)
[hide inferior taxa]
Spermophilus citellus (species)
Spermophilus lateralis (species)
Spermophilus parryii (species)
Spermophilus sp. (species)
Spermophilus townsendii (species)
Spermophilus tridecemlineatus (species)