The Long-tailed Spiny-rat, Proechimys longicaudatus, is a spiny rat species from South America. It is found in Bolivia, Brazil, Peru and Paraguay.
- Woods, C. A. and C. W. Kilpatrick. 2005. Hystricognathi. Pp 1538-1600 in Mammal Species of the World a Taxonomic and Geographic Reference 3rd ed. D. E. Wilson and D. M. Reeder eds. Smithsonian Institution Press, Washington D.C.