Helaletidae

Heptodon is an extinct genus of tapir-type herbivore of the family Helaletidae endemic to North America during the Early Eocene. It lived from 50.3—48.6 mya, existing for approximately .

The Helaletidae are an extinct family of tapiroid, closely related and likely ancestral to the true tapirs, which contain Protapirus and all descendants. In alternative classifications, Helaletidae is treated as a subfamily within the Tapiridae, the Helaletinae.

Colodon is an extinct genus of herbivorous mammals that were related to tapirs of today.