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Cotton rat

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Through North America, South America and Molar (tooth)

They are primarily herbivores. The molars of cotton rats are S-shaped when viewed from above. The genus name literally means S-tooth.

Sigmodon hispidus was the first model organism to be used in polio research.

Classification

  • Genus Sigmodon
    • Subgenus Sigmodon
      • Sigmodon hispidus species group
        • Sigmodon alleni - Allen's cotton rat
        • Sigmodon arizonae - Arizona cotton rat
        • Sigmodon hirsutus - Southern cotton rat
        • Sigmodon hispidus - Hispid cotton rat
        • Sigmodon mascotensis - Jaliscan cotton rat
        • Sigmodon ochrognathus - Yellow-nosed cotton rat
        • Sigmodon planifrons - Miahuatlán cotton rat
        • Sigmodon toltecus - Toltec cotton rat
        • Sigmodon zanjonensis - montane cotton rat
      • Sigmodon fulviventer species group
        • Sigmodon fulviventer - tawny-bellied cotton rat
        • Sigmodon inopinatus - unexpected cotton rat
        • Sigmodon leucotis - white-eared cotton rat
        • Sigmodon peruanus - Peruvian cotton rat
    • Subgenus Sigmomys
      • Sigmodon alstoni - Alston's cotton rat

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