Leptocyon (Greek: "slender dog") is an extinct genus of small canid endemic to North America. It lived during the Oligocene and Miocene epochs, 31 to 10 million years ago. They are the most primitive known members of the Caninae, the subfamily to which all living dogs and foxes belong.
|Drawing of the holotype skull of Leptocyon gregorii|
|Fossil range of Leptocyon species|
Neocynodesmus Macdonald 1963
Leptocyon was a small-bodied, fox-like animal with a slender jaw, weighing less than 2 kilograms (4.4 lb). They were probably omnivorous, feeding on small animals and fruit, and remained relatively unchanged for millions of years. One species, L. delicatus, was the smallest known canid.
- "Leptocyon". About.com. Retrieved 14 July 2015.
- PaleoBiology Database: Leptocyon, basic info
- Wang, Xiaoming; Tedford, Richard H. (2008). Dogs, Their Fossil Relatives and Evolutionary History. Columbia. p. 53. ISBN 978-0-231-13528-3.
- Evolution of Tertiary Mammals of North America: Terrestrial animals of North America Volume 1, Terrestrial Carnivores, Ungulates, and Ungulate like Mammals. Christine M. Janis carnivores. Louis L. Jacobs, Kathleen Marie Scott.