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. 1990 May 15;46(5):506-8.
doi: 10.1007/BF01954248.

The largest known chromosome number for a mammal, in a South American desert rodent

L C Contreras  1 , J C Torres-Mura, A E Spotorno
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The largest known chromosome number for a mammal, in a South American desert rodent

L C Contreras et al. Experientia. .

Abstract

Tympanoctomys barrerae, a desert specialist member of the family Octodontidae, until now thought to be conservative, and ancestral to South American hystricognath rodents, presents the highest diploid chromosome number (2n = 102) known in a mammal. Unexpectedly, its karyotype was found to be composed mainly of metacentric to sub-metacentric chromosomes. Mechanisms by which such a karyotype may have been derived are discussed.

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References

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