Key to the Rodentia
		Ear usually less than 22 mm; tail greater than length of head and body; auditory bullae average, not greatly inflated (Fig. 59a)						Ear usually more than 22 mm; tail less than length of head and body; auditory bullae large and inflated (Fig. 59b)
Artiodactyla  -  Carnivora  -  Chiroptera  -  Didelphimorphia  -  Insectivora  -  Lagomorpha  -  Rodentia  -  Xenarthra Scientific Names - Common Names