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Rattus villosissimus Rattus sordidus Rattus lutreolus Rattus tunneyi Rattus fuscipes Rattus leucopus Rattus praetor Rattus tanezumi Rattus rattus Rattus exulans Rattus norvegicus Mus musculus Microtus kikuchii
0 6 12 18 24 Time (MYA)
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