Key to the Rodentia
           
 
 Tail short and plump, approximately one-half of head and body length; coronoid process relatively high and recurved (Fig. 54a)
   
 Tail at least approximating head and body length; coronoid process relatively low and not strongly recurved (Fig. 54b) (except Baiomys)
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names