https://sciencythoughts.blogspot.com/2013/12/a-new-species-of-leptictid-mammal-from.html
Sciency Thoughts: A new species of Leptictid Mammal from the Late Eocene of South Dakota.
Leptictid Mammals appeared early in the post-Cretaceous radiation of Mammals, and persisted till the Oligocene. They may have been distant ...