Oligoryzomys griseolus, also known as the grizzled colilargo[2] or the grayish pygmy rice rat,[1] is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in the Andes of Venezuela and nearby Colombia.[1] Its karyotype has 2n = 62 and FNa = 74–76.[3]
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