A family of the order rodentia containing 250 genera including the two genera mus and rattus, from which the laboratory inbred strains are developed. The fifteen subfamilies are hesperomyinae (new world mice and rats), cricetinae, spalacinae, myospalacinae, lophiomyinae, platacanthomyinae, nesomyinae, otomyinae, rhizomyinae, microtinae (arvicolinae), gerbillinae, dendromurinae, cricetomyinae, murinae (old world mice and rats), and hydromyinae.
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... their association with humans. This huge order of animals encompasses 27 separate families, including not only the “true” rats and mice (family Muridae) but also such diverse groups as porcupines, be
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