
Condylarthra is an informal group- previously considered an order- of extinct placental mammals, known primarily from the Paleocene and Eocene epochs. They are considered early, primitive ungulates. == Taxonomic history == Condylarthra always was a problematic group. When Condylarthra was first described by {Harvnb|Cope|1881}, Phenacodontidae was ...
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http://en.wikipedia.org/wiki/Condylarth

any of the primitive ungulate mammals of the extinct order Condylarthra, from the Paleocene and Eocene epochs, having a slender body, low-crowned teeth, and five-toed feet, each toe ending in a small hoof.
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https://www.infoplease.com/dictionary/condylarth
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