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Otomys: African Swamp Rats, or Groove-toothed Rats - English
URL: http://www.press.jhu.edu/books/walkers_mammals_of_the_world/rodentia.muridae.oto

African swamp rats are characterized by having at least one conspicuous groove on all four incisor teeth. The upper incisors are strongly curved backward into the mouth. The head of Otomys is rounded and rather volelike, and the ears are relatively small. Dasymys closely resembles Otomys in external appearance, but that genus lacks the grooved incisors and has a longer tail. Otomys has a stocky body form. Females have four mammae.

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Rodentia Muridae Otomys, World Distribution Table - English
URL: http://www.press.jhu.edu/books/walkers_mammals_of_the_world/tables/table.genus.r

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