Baiomys
| Baiomys Temporal range: Early Pliocene to Recent | |
|---|---|
| Baiomys musculus | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Rodentia | 
| Family: | Cricetidae | 
| Subfamily: | Neotominae | 
| Tribe: | Baiomyini | 
| Genus: | Baiomys True, 1894 | 
| Type species | |
| Hesperomys taylori Thomas, 1887 | |
| Species | |
| Baiomys brunneus (J. A. Allen & F. M. Chapman, 1897) | |
Baiomys, the New World pygmy mice, is a genus of rodents in the family Cricetidae. Together with Scotinomys, it forms the tribe Baiomyini. It contains the smallest rodents in North America. It currently contains three extant species:
- Southern pygmy mouse, Baiomys brunneus
- Mexican pygmy mouse, Baiomys musculus
- Northern pygmy mouse, Baiomys taylori
Additionally, there are seven known fossil species: