Key to the Rodentia
           
 
 Entire foot and ankle white (Fig. 61a); toothrow usually less than 4 mm; interorbital breadth narrow
   
 Ankle gray, color encroaching on proximal part of upper surface of foot (Fig. 61b); toothrow usually more than 4 mm; interorbital breadth wider
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names