Isectolophidae is a possibly paraphyletic extinct family of browsing, herbivorous, mammals in the order Perissodactyla.
Isectolophidae has been interpreted as a family within Tapiroidea, or as a sister group to the rest of the Tapiromorpha, which includes the Ancylopoda (lophiodontids and Chalicotherioidea) and the Ceratomorpha (tapirs, rhinoceroses and their extinct relatives).
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