The giant muntjac (Megamuntiacus vuquangensis) was discovered in 1994
in evergreen forests of the Annamite Mountains that border Laos (Lao P
eople's Democratic Republic) and Vietnam. We describe its known distri
bution in Laos and provide the first detailed description of the speci
es. Comparison of its skull and antlers with those of sympatric red mu
ntjacs (Muntiacus muntjak) and other muntjacs support its designation
as a distinct species. Morphological and genomic DNA data suggest that
the giant muntjac belongs with other muntjacs in the genus Muntiacus
and not in a genus of its own.