Tsaganomyids are generally considered to be related to the Hystricognathi (porcupines and relatives). Members of Tsaganomyidae were fossorial (digging) rodents that probably used their incisor teeth to dig like some living mole rats.
Tsaganomyids share similarities with Hystricognathi (porcupines and relatives) in terms of evolutionary relationships. Members of Tsaganomyidae resembled burrowing rodents that used their incisor teeth similarly to some living mole rats when excavating.