A single specimen of the Roosevelt's Muntjac or Roosevelt's barking deer (Muntiacus rooseveltorum) was presented to the Field Museum in 1929 following a hunting expedition led by Theodore (Jnr) and Kermit Roosevelt. The specimen is slightly smaller than the common muntjac and DNA testing has shown it to be distinct from recently-discovered muntjac species. There have been several recent claims to have rediscovered the species, from evidence including skulls owned by villagers in the Truong Son (Annamite) mountains between Laos and Vietnam. It is a subspecies of Fea's muntjac, whose home range is mountains further northwest separated by lower land. However, without further evidence, the exact position of Roosevelt's muntjac cannot be stated.
Rediscovery of Roosevelt's Barking Deer (Muntiacus rooseveltorum), George Amato, Mary G. Egan, George B. Schaller, Richard H. Baker, Howard C. Rosenbaum, William G. Robichaud, Rob DeSalle, Journal of Mammalogy, Vol. 80, No. 2 (May, 1999), pp. 639-643