Roosevelt's muntjac

Roosevelt's muntjac, Muntiacus rooseveltorum, also called Roosevelt's barking deer, was known for decades from a single specimen presented to the Field Museum in 1929 after the Kelley-Roosevelts expedition led by Theodore Roosevelt Jr. 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, though one source treats it as a subspecies of Fea's muntjac and its exact position cannot be stated without further evidence. The animal was believed extinct since 1929, but there have been recent claims of rediscovery, including skulls owned by villagers in the Truong Son mountains of northern Laos and far northwestern Vietnam, and camera-trap photographs at Xuan Lien Nature Reserve in Vietnam that appear to show two individuals.