Tuft-tailed Spiny Tree Rat
Lonchothrix emiliae
- Least concern
- Card rarity: Common
- Mammals

The tuft-tailed spiny tree rat is a spiny rat species from Brazil south of the Amazon River, where it has been found in grassland and gallery forest. It is the only species in the genus Lonchothrix.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Echimyidae
- Genus
- Lonchothrix