Key to the Rodentia
           
 
 Head and body approximately 85 mm in length; fur harsh and bristly, mixed orange and black with clear orange band on side, belly white; mastoids well developed but not projecting posteriorly beyond plane of occipital (Fig. 42a)
   
 Head and body 85 mm or less in length; fur silky, mixed buffy and black, white beneath; mastoids well developed, projecting posteriorly beyond plane of occipital; bullae swollen and encroaching to midline of skull (Fig. 42b)
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names