Family Echimyidae Gray, 1825 - spiny rats Genus Echimys Cuvier, 1809 - arboreal spiny rats Echimys cristatus Desmarest, 1817 see Echimys chrysurus (Zimmermann, 1780) Subgenus Phyllomys Lund, 1839 see Genus Phyllomys Lund, 1839