Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Erethizontidae Bonaparte, 1845 - New World porcupines
       1 Genus Erethizon Cuvier, 1822 - North American porcupine
       2 Genus Coendou Lacépède, 1799 - prehensile-tailed porcupines
       3 Genus Echinoprocta Gray, 1865 - Upper Amazonian porcupine see Genus Coendou Lacépède, 1799
       4 Genus Chaetomys Gray, 1843 - thin-spined "porcupine"