A new genus and species of primitive micropternodontid soricomorph insectivores, Prosarcodon lonanensis, is described from the Paleocene Fangou Formation, Shaanxi Province, People's Republic of China. Prosarcodon lonanensis sheds new light on the origin of the mammalian family Micropternodontidae, linking them to the Palaeoryctoidea and demonstrating an early Asian oc-currence of the micropternodontids prior to theirapparent restriction to North America. The pe-trosal bone of Prosarcodon is similar to that of Palaeoryetes puereensis from the North American Paleocene. Prosarcodon and Sarcodon were both specialized in the loss of a molar, unlike the younger genus Sinosinopa from Inner Mongolia (Nei Mongol), PRC.