Opinions from A. J. Piaggio and G. S. Spicer 2000
- 'Eutamias is a subjective synonym of Tamias'
- 'Eutamias adsitus is a subjective synonym of Tamias umbrinus'
- 'Eutamias atristriatus is a subjective synonym of Tamias minimus'
- 'Eutamias bulleri is recombined as Tamias bulleri'
- 'Eutamias bulleri belongs to Eutamias' according to Miller and Rehn 1901
- 'Eutamias canescens is a subjective synonym of Tamias dorsalis'
- 'Eutamias canicaudus is a subjective synonym of Tamias amoenus'
- 'Eutamias caniceps is a subjective synonym of Tamias minimus'
- 'Eutamias canipes is recombined as Tamias canipes'
- 'Eutamias canipes belongs to Eutamias' according to Fleharty 1960
- 'Eutamias caurinus is a subjective synonym of Tamias amoenus'
- 'Eutamias consobrinus is a subjective synonym of Tamias minimus'
- 'Eutamias durangae is recombined as Tamias durangae'
- 'Eutamias hopiensis is a subjective synonym of Tamias rufus'
- 'Eutamias ludibundus is a subjective synonym of Tamias amoenus'
- 'Eutamias malloryi is recombined as Tamias malloryi'
- 'Eutamias merriami is recombined as Tamias merriami'
- 'Eutamias merriami belongs to Eutamias' according to Merriam 1897
- 'Eutamias ochrogenys is recombined as Tamias ochrogenys'
- 'Eutamias ochrogenys belongs to Eutamias' according to Sutton and Nadler 1974
- 'Eutamias oreocetes is a subjective synonym of Tamias minimus'
- 'Eutamias palmeri is a subjective synonym of Tamias umbrinus'
- 'Eutamias ruficaudus is recombined as Tamias ruficaudus'
- 'Eutamias ruficaudus belongs to Eutamias' according to Howell 1920
- 'Eutamias siskiyou is recombined as Tamias siskiyou'
- 'Eutamias siskiyou belongs to Eutamias' according to Sutton and Nadler 1974
- 'Eutamias sonomae is a subjective synonym of Tamias townsendii'
- 'Eutamias sonomae is a subjective synonym of Tamias townsendii' according to Johnson 1943
- 'Sciurus quadrivittatus is recombined as Tamias quadrivittatus'
- 'Sciurus quadrivittatus is recombined as Tamias quadrivittatus' according to Allen 1890
- 'Sciurus striatus is recombined as Tamias striatus'
- 'Sciurus striatus is recombined as Tamias striatus' according to Levenson et al. 1985
- 'Tamias alpinus belongs to Tamias'
- 'Tamias amoenus belongs to Tamias'
- 'Tamias callipeplus is a subjective synonym of Tamias speciosus'
- 'Tamias cinereicollis belongs to Tamias'
- 'Tamias cooperi is a subjective synonym of Tamias townsendii'
- 'Tamias dorsalis belongs to Tamias'
- 'Tamias frater is a subjective synonym of Tamias amoenus'
- 'Tamias hindei is a subjective synonym of Tamias townsendii'
- 'Tamias macrohabdotes is a subjective synonym of Tamias quadrimaculatus'
- 'Tamias minimus belongs to Tamias'
- 'Tamias nexus is a subjective synonym of Tamias durangae'
- 'Tamias obscurus belongs to Tamias'
- 'Tamias obscurus is a subjective synonym of Tamias merriami' according to Blankenship and Bradley 1984
- 'Tamias panamintinus belongs to Tamias'
- 'Tamias pricei is a subjective synonym of Tamias merriami'
- 'Tamias quadrimaculatus belongs to Tamias'
- 'Tamias senex belongs to Tamias' according to Sutton 1987
- 'Tamias senex belongs to Tamias' according to Kain 1985
- 'Tamias senex is a subjective synonym of Tamias townsendii' according to Levenson and Hoffmann 1984
- 'Tamias senex belongs to Tamias'
- 'Tamias speciosus belongs to Tamias'
- 'Tamias townsendii belongs to Tamias'
- 'Tamias umbrinus belongs to Tamias'