Opinions from J. M. Mercer and V. L. Roth 2003
- 'Aeretes belongs to Pteromyinae'
- 'Aeromys belongs to Pteromyinae'
- 'Aliveria belongs to Pteromyinae'
- 'Ammospermophilus belongs to Marmotini'
- 'Atlantoxerus belongs to Xerini'
- 'Belomys belongs to Pteromyinae'
- 'Callosciurini belongs to Sciuridae'
- 'Callosciurus belongs to Callosciurini'
- 'Cynomys belongs to Marmotini'
- 'Dremomys belongs to Callosciurini'
- 'Eoglaucomys belongs to Pteromyinae'
- 'Epixerus belongs to Protoxerini'
- 'Eupetaurus belongs to Pteromyinae'
- 'Eutamias belongs to Marmotini'
- 'Exilisciurus belongs to Callosciurini'
- 'Funambulini belongs to Sciuridae'
- 'Funambulus belongs to Funambulini'
- 'Funisciurus belongs to Protoxerini'
- 'Glaucomys belongs to Pteromyinae'
- 'Glyphotes belongs to Callosciurini'
- 'Heliosciurus belongs to Protoxerini'
- 'Hylopetes belongs to Pteromyinae'
- 'Hyosciurus belongs to Callosciurini'
- 'Iomys belongs to Pteromyinae'
- 'Lariscus belongs to Callosciurini'
- 'Marmota belongs to Marmotini'
- 'Marmotini belongs to Sciuridae'
- 'Menetes belongs to Callosciurini'
- 'Microsciurus belongs to Sciurini'
- 'Miopetaurista belongs to Pteromyinae'
- 'Myosciurus belongs to Protoxerini'
- 'Nannosciurus belongs to Callosciurini'
- 'Neotamias belongs to Marmotini'
- 'Paraxerus belongs to Protoxerini'
- 'Petaurillus belongs to Pteromyinae'
- 'Petaurista belongs to Pteromyinae'
- 'Petauristini is an invalid subgroup of Pteromyinae'
- 'Petinomys belongs to Pteromyinae'
- 'Prosciurillus belongs to Callosciurini'
- 'Protoxerini belongs to Sciuridae'
- 'Protoxerus belongs to Protoxerini'
- 'Pteromyinae belongs to Sciuridae'
- 'Pteromys belongs to Pteromyinae'
- 'Pteromyscus belongs to Pteromyinae'
- 'Ratufa belongs to Ratufini'
- 'Ratufini belongs to Sciuridae'
- 'Rheithrosciurus belongs to Sciurini'
- 'Rhinosciurus belongs to Callosciurini'
- 'Rubrisciurus belongs to Callosciurini'
- 'Sciurillus belongs to Sciuridae'
- 'Sciurinae is an invalid subgroup of Sciuridae'
- 'Sciurini belongs to Sciuridae'
- 'Sciurotamias belongs to Sciuridae'
- 'Sciurus belongs to Sciurini'
- 'Spermophilinus belongs to Marmotini'
- 'Spermophilopsis belongs to Xerini'
- 'Spermophilus belongs to Marmotini'
- 'Sundasciurus belongs to Callosciurini'
- 'Syntheosciurus belongs to Sciurini'
- 'Tamias belongs to Marmotini'
- 'Tamiasciurini belongs to Sciuridae'
- 'Tamiasciurus belongs to Tamiasciurini'
- 'Tamiini is a subjective synonym of Marmotini'
- 'Tamiops belongs to Callosciurini'
- 'Trogopterus belongs to Pteromyinae'
- 'Xerini belongs to Sciuridae'
- 'Xerus belongs to Xerini'