Abstract
THREE main types, or mutations, are known of the common house rat: (1) a grey type with grey belly (Rattus rattus rattus, Linnæus), (2) a brown type with grey belly (R. r. alexandrinus, E. Geoffroy), (3) a brown type with a creamy belly (R. r. frugivorus, Rafinesque).
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SCHWARZ, E. Origin of African House Rats. Nature 133, 573 (1934). https://doi.org/10.1038/133573b0
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DOI: https://doi.org/10.1038/133573b0
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