The Caijiachong Formation is a geologic formation in Yunnan, southwestern China. The Caijiachong Formation was formerly correlated to the Early Oligocene, but is now considered to date to the Late Eocene, correlated to the Ulangochuian or Ergilian land mammal age.
Mammal fossils
Artiodactyls Genus/familySpeciesNotes/affinitiesImageBothriodonB. chowiAn anthracothere. Fossils initially (and erroneously) assigned to Merycopotamus sp.EntelodontellusE. zhouliangiAn entelodontcf. Miomeryxcf. M. sp.A ruminant
Perissodactyls Genus/familySpeciesNotes/affinitiesImageBrontotheriidaeBrontotheriidae gen. indet.An unidentified brontothereCadurcodonC. ardynensisAn amynodontC. sp.An amynodontGigantamynodonG. giganteusAn amynodontG. cf. giganteusAn amynodontG. sp.An amynodontcf. Metamynodoncf. M. sp.An amynodontUrtinotheriumU. intermediumA paracerathere
Other fossils In addition to mammals, fossils of several other groups are also known from the Caijiachong Formation, including crocodiles, fishes, gastropods, and charophytes.
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