Is the guinea-pig a rodent?

@article{Graur1991IsTG,
  title={Is the guinea-pig a rodent?},
  author={Dan Graur and Winston A Hide and Wen-Hsiung Li},
  journal={Nature},
  year={1991},
  volume={351},
  pages={649-652}
}
THE guinea-pig (Caviaporcellus), traditionally classified as a New World hystricomorph rodent, often shows anomalous morphological and molecular features in comparison with other eutherian mammals1–14. For example, its insulin differs from that of other mammals in anabolic and growth-promoting activities and in its capability to form hexamers5,6. Indeed, the literature about the molecular evolution of guinea-pigs abounds in references to 'convergent evolution', 'extremely rapid rates of… Expand
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