A conflicting proposal links the Perissodactyla and Cetartiodactyla in a clade named Euungulata.
Zooamata |
There is uncertainty regarding the placement of Perissodactyla; a grouping with Ferae has been proposed as the clade Zooamata while a grouping with Cetartiodactyla has been proposed as the clade Euungulata ("true ungulates").