Southern pygmy mouse
- kingdom: Animalia
- phylum: Chordata
- class: Mammalia
- order: Rodentia
- family: Cricetidae
- genus: Baiomys
- species: Baiomys musculus
San Miguel
San Miguel
El SalvadorJutiapa
Jutiapa
GuatemalaSan Marcos
JaliscoTehuacán
Puebla
Mexico