Family Echimyidae Gray, 1825 - spiny rats
1 Genus †Lonchophorus Lund, 1839
see Genus Phyllomys Lund, 1839
1 Genus Phyllomys Lund, 1839 - Atlantic tree rats
2 Genus Nelomys Jourdan, 1837
see Genus Echimys Cuvier, 1809
2 Genus Nelomys Cuvier, 1838
see Genus Nelomys Jourdan, 1837
3 Genus Echimys Cuvier, 1809 - arboreal spiny rats
4 Genus Myoxus Zimmermann, 1780, nom. illeg. - fat dormouse
see Genus Glis Brisson, 1762