Key to the Rodentia
           
 
 Upper incisors stout, grooved along lateral border; color brownish mixed with gray, black and yellow; hind foot about the same length as tail; six plantar tubercles on the hind foot (Fig. 62a)
   
 Upper incisors slender and smooth; color brownish gray or auburn to reddish; hind foot longer than tail, or if approximately the same length, then usually with only five plantar tubercles on the hind foot (Fig. 62b)
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names