Polydolopimorphia Cocatherium List of prehistoric mammals Asiatherium Stagodontidae Pappotherium Sinodelphys Atokatheridium Itaboraian Australohyaena Chulpasia Andinodelphys Deltatheroides Gurlin Tsav skull Deltatheridium Herpetotherium Antarctodolops Unnuakomys Peratherium Fredszalaya Siamoperadectes Arminiheringia Riochican Argyrolagus Arcantiodelphys Scalaridelphys Prothylacinus Proborhyaenidae Anatoliadelphys Hondalagus Mayulestes Mimoperadectes Deltatheroida Callistoe Gurbanodelta Holoclemensia Alphadontidae Paraborhyaena Proborhyaena Herpetotheriidae Oklatheridium Albertatherium Nanocuris Maastrichtidelphys Tsagande…

elta Patagosmilus Pharsophorus Alphadon Lotheridium Eodelphis Bonapartherium Pucadelphys Borhyaena Peradectes Peradectidae Sulestes Epidolops Deltatheridiidae Cladosictis Amphiperatherium Thylacosmilidae Protalphadon Borhyaenidae Hondonadia Thylacosmilus Mustersan Sparassodonta Casamayoran Divisaderan Didelphodon La Meseta Formation Sarmiento Formation