Leptocyon was named by Matthew (1918). It was synonymized subjectively with Vulpes by Gregory (1942); it was revalidated by Webb (1969), Carroll (1988) and Munthe (1998). It was assigned to Canidae by Matthew (1918), Webb (1969), Carroll (1988) and Munthe (1998).
^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.
^J. T. Gregory. 1942. University of California Publications, Bulletin of the Department of Geological Sciences 26(4)
^S. D. Webb. 1969. University of California Publications in Geological Sciences 78
^S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology 1(1):85-98