Pittier's crab-eating rat explained

Pittier's crab-eating rat (Ichthyomys pittieri) is a species of semiaquatic rodent in the family Cricetidae.[1] It is endemic to Venezuela. The natural habitats of this species are rivers and swamps. Its karyotype has 2n = 92 and FNa = 98. This was previously thought to be the highest chromosome number known for a mammal,[2] but it has since been found that the plains viscacha rat or red viscacha rat (Tympanoctomys barrerae) has 4x = 2n = 102.[3]

Notes and References

  1. Ichthyomys pittieri Handley & Mondolfi, 1963 . 1002490.
  2. Schmid . M. . Fernández-Badillo . A. . Feichtinger . W. . Steinlein . C. . Roman . J. I. . On the highest chromosome number in mammals . Cytogenetic and Genome Research . 49 . 4 . 305–8 . 1988 . 3073914. 10.1159/000132683.
  3. Contreras LC, Torres-Mura JC, Spotorno AE . The largest known chromosome number for a mammal, in a South American desert rodent . Experientia . 46 . 5 . 506–508 . 1990 . 10.1007/BF01954248 . 2347403.

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