Echimyidae

thumb|right|Armored rat, Hoplomys gymnurus thumb|right|White-tailed olalla rat, Olallamys albicauda thumb|right|Red-crested tree rat, Santamartamys rufodorsalis

species of mammal

species of mammal

Echimyinae is a subfamily of rodents belonging to the spiny rats family Echimyidae. It contains 14 arboreal genera—all the members of the tribe Echimyini, plus Callistomys—a few terrestrial genera (Thrichomys, Hoplomys, and Proechimys), and a subaquatic genus (Myocastor).