WAcrophocaWAdinotheriumWAmerhippusWArchaeogeryonWArctotheriumWAristonectesWAstrapotheriumWAtacamatitanWBaculitesWBorhyaenaWCalappiliaWChilesaurusWCladophlebisWCladosictisWCuvieroniusWDusicyon avusWEocardiaWEuclastesWList of gomphothere fossils in South AmericaWGyrodusWHemisyntrachelusWHippidionWHomalodotheriumWHondonadiaWLeedsichthysWMacraucheniaWMegatheriumWMylodonWNematheriumWNesodonWOdobenocetopsWOlcostephanusWPachyrukhosWPelagornisWPeltephilusWPlatypterygiusWProthylacinusWProtypotheriumWScelidodonWStriatolamiaWThalassocnusWTheosodonWVarasichthysWZamites