[2] Known only from recent fossil deposits, it most likely persisted until European colonization of Puerto Rico began.

Spiny rats are a group of hystricognath rodents in the family Echimyidae.

Most species have stiff pointed hairs, or a bristly coat of flat flexible spines that allow for protection.

This species most likely did not do well in conditions of high heat and aridity and are restricted to regions with an abundant source of water.

Their diet most likely included fruits, nuts, grass, and sugar cane.