| image = Rattus rattus05.jpg | image_width = 200px | image_caption = Black Rat (Rattus rattus) | regnum = Animalia | phylum = Chordata | classis = Mammalia | ordo = Rodentia | superfamilia = Muroidea | familia = Muridae | familia_authority = Illiger, 1811 | subdivision_ranks = Subfamilies | subdivision = Deomyinae Gerbillinae Lophiomyinae Leimacomyinae Murinae }} Muridae's the largest family of mammals. It contains over 600 species found naturally throughout Eurasia, Africa, and Australia. The… (More on Muridae)