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An international team of paleontologists has discovered a well-preserved fossil of a proto-mammal, named Megaconus mammaliaformis, that lived in what is now the Inner Mongolia Region of China about 165 million years ago. The fossil provides evidence that hair and fur originated well before the rise of the first true mammals. Megaconus co-existed with feathered dinosaurs in the Jurassic era, nearly 100 million years before Tyrannosaurus rex roamed our planet.....Preserved in the fossil is a clear halo of guard hairs and underfur residue, making Megaconus only the second known pre-mammalian fossil with fur. It was found with sparse hairs around its abdomen, leading the team to hypothesize that it had a naked abdomen.