Evolutionary Problems Discovered in New Cretaceous Mammal

A joint research team led by MAO Fangyuan of the Chinese Academy of Sciences ' Institute of Vertebrate Paleontology and Paleoanthropology and MENG Jin of the American Museum of Natural History reported a new symmetrodont, Origolestes lii, an Early Cretaceous Jehol Biota stem therian mammal, in China's Liaoning. A key feature of Origolestes is the absence of the bone connection between the vocal bones and Meckel's cartilage, demonst....