WAceratherium
WAdilophontes
WAnthracotherium
WArchaeotherium
WArsinoiterium
WAstrapotherium
WBazylozaur
WChalicotherium
WCynodictis
WHalitherium
WHienodon
WHyracodon
WMammalodon
WMegistoterium
WMesohippus
WMetamynodon
WMylagaulidae
WObdurodon insignis
WParaceratherium
WProailurus
WSaadanius
WSteneofiber
WSubhyracodon
WWaipatia