Temporal range: Early Eocene
Heptodon was named by Cope (1882). It was considered paraphyletic by Colbert (2005). It was assigned to Helaletinae by Radinsky (1966); to Ceratomorpha by Cope (1882) and Colbert and Schoch (1998); to Heptodontidae by Holbrook (1999); and to Tapiroidea by Colbert (2005). M. W. Colbert. 2005.
Heptodon was about 1 metre (3.3 ft) in length, and closely resembled modern tapirs. The shape of the skull suggests that it probably lacked the characteristic tapir trunk. Instead it probably had a slightly elongated, fleshy upper lip, like its relative Helatetes.
- PaleoBiology Database: Heptodon, basic info
- L. T. Holbrook. 1999. The Phylogeny and classification of tapiromorph perissodactyls (Mammalia) . Cladistics 15(3):331-350
- M. W. Colbert and R. M. Schoch. 1998. Tapiroidea and other moropomorphs. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary mammals of North America 569-582
- Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 261. ISBN 1-84028-152-9.
- M. Mendoza, C. M. Janis, and P. Palmqvist. 2006. Estimating the body mass of extinct ungulates: a study on the use of multiple regression. Journal of Zoology 270