Phenacodus (1920) by Heinrich Harder
Phenacodus is an extinct genus of mammals from the late Paleocene through middle Eocene, about 55 million years ago. It is one of the earliest and most primitive of the ungulate mammals… (wikipedia)

Phenacodus (1920) by Heinrich Harder

Phenacodus is an extinct genus of mammals from the late Paleocene through middle Eocene, about 55 million years ago. It is one of the earliest and most primitive of the ungulate mammals… (wikipedia)

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