Polydolopimorphia List of prehistoric mammals Stagodontidae Asiatherium Sinodelphys Atokatheridium Itaboraian Pappotherium Chulpasia Australohyaena Andinodelphys Deltatheroides Gurlin Tsav skull Deltatheridium Herpetotherium Antarctodolops Peratherium Fredszalaya Siamoperadectes Arminiheringia Unnuakomys Arcantiodelphys Scalaridelphys Argyrolagus Prothylacinus Proborhyaenidae Deltatheroida Mimoperadectes Hondalagus Anatoliadelphys Mayulestes Alphadontidae Paraborhyaena Proborhyaena Herpetotheriidae Oklatheridium Nanocuris Albertatherium Maastrichtidelphys Callistoe Holoclemensia Gurbanodelta Tsagandelta Patagosmilus Pharsophorus Alphadon Eodelphis Lotheridium Bonapartherium Borhyaena Pucadelphys Peradectes Peradectidae Protalphadon …

Thylacosmilidae Cladosictis Deltatheridiidae Epidolops Sulestes Amphiperatherium Borhyaenidae Hondonadia Thylacosmilus Itaboraí Formation Sparassodonta Didelphodon