阿根廷平原鼠（學名：Tympanoctomys barrerae）是齧齒目八齒鼠科中的一種，分布於阿根廷中西部的平原地區，夜行群居，植食性。[1] 該物種的特別之處是其基因為四倍體（4x = 2n = 102）。
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