Class Mammalia Linnaeus, 1758 - mammals Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997 Family Tragulidae Milne-Edwards, 1864 - chevrotains Genus Hyemoschus Gray, 1845 - water chevrotain Hyemoschus aquaticus (Ogilby, 1840[1841]) - water chevrotain