Ischyromys sp. SOLD
Period: Oligocene.
Training: Brule.
Origin: White River Badlands, South Dakota, USA.
Training: Brule.
Origin: White River Badlands, South Dakota, USA.
Jaw measurements: 1.4 cm x 1.1 cm
Hemimandible of Ischyromys.
About 33 million years ago, during the early Oligocene, the rodent Ischyromys It inhabited the central area of ​​North America. These ancient rodents were more than half a meter long and resembled large mice, but they probably lived in trees like today's squirrels. Although they are considered among the most primitive rodents, they had large front teeth (called incisors) like the rodents we know today. Ischyromys It became extinct about 25 million years ago. The only living relative is the mountain beaver Aplodontia rufa, a small rodent that now lives along the west coast of North America.
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