Cetacea/Artiodactyla Montgelard, Catzeflis & Douzery 1997 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997 Family †Mesonychidae Cope, 1875 Genus †Ankalogon nom. null. see Genus Ankalagon van Valen, 1980