Key to the Rodentia
           
 
 Pelage very dark, black mixed with yellow, tail and feet colored like body; nose blunt and ears small, overall appearance vole-like, except for long tail; crowns of cheek teeth with S-shaped looping cusps (Fig. 55)
   
 Pelage lighter, feet white or whitish; ears and nose not vole-like; crowns of cheek teeth without S-shaped loops
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names