Gracile Atlantic Spiny-rat
Trinomys gratiosus
- Least concern
- Card rarity: Common
- Mammals

Trinomys gratiosus is a species in the mainly South American family Echimyidae, the spiny rats; it occurs in southeast Brazil from the south bank of the River Doce, Espirito Sante, southward to Teresopolis, Rio de Janeiro.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Echimyidae
- Genus
- Trinomys